Upload 14 files

.dockerignore

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+# ── .dockerignore ─────────────────────────────────────────────────────────────
+# Exclude files that should never end up in the Docker image
+
+# Git metadata
+.git
+.gitignore
+
+# Docs (not needed at runtime)
+README.md
+*.md
+docs/
+
+# Python cache
+__pycache__/
+*.py[cod]
+*.pyo
+.pytest_cache/
+.mypy_cache/
+*.egg-info/
+dist/
+build/
+.eggs/
+
+# Virtual envs
+.venv/
+venv/
+env/
+
+# IDE / editor
+.vscode/
+.idea/
+*.swp
+*.swo
+.DS_Store
+
+# Local dev overrides
+.env
+.env.*
+docker-compose*.yml
+*.local
+
+# Test artefacts
+tests/
+test_*
+coverage.xml
+.coverage

.gitignore

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+# ── .gitignore ────────────────────────────────────────────────────────────────
+
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+.pytest_cache/
+*.egg-info/
+dist/
+build/
+.eggs/
+.venv/
+venv/
+env/
+
+# Environment / secrets
+.env
+.env.*
+*.secret
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+.DS_Store
+Thumbs.db
+
+# Docker local artifacts
+docker-compose*.yml
+*.local
+
+# Runtime data (stays in /data, not in repo)
+data/
+logs/
+*.log
+
+# OS
+.DS_Store

Dockerfile

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+FROM ubuntu:24.04
+
+# ── Metadata ────────────────────────────────────────────────────────────────
+LABEL maintainer="HuggingFace Space"
+LABEL description="Ubuntu 24.04 XFCE Desktop via noVNC – PRoot-Distro Style"
+LABEL version="1.0.0"
+
+# ── Environment ─────────────────────────────────────────────────────────────
+ENV DEBIAN_FRONTEND=noninteractive \
+    TZ=UTC \
+    LANG=en_US.UTF-8 \
+    LANGUAGE=en_US:en \
+    LC_ALL=en_US.UTF-8 \
+    DISPLAY=:1 \
+    VNC_PORT=5901 \
+    NOVNC_PORT=6080 \
+    DASH_PORT=5000 \
+    NGINX_PORT=7860 \
+    RESOLUTION=1280x720 \
+    COLOR_DEPTH=16 \
+    VNC_PASSWORD="" \
+    HOME=/data/home \
+    USER=ubuntu \
+    XDG_RUNTIME_DIR=/tmp/runtime-ubuntu
+
+# ── Stage 1: base tools + locale ────────────────────────────────────────────
+# Install curl/gnupg/ca-certificates first so we can add the Mozilla apt repo.
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    locales \
+    ca-certificates \
+    curl \
+    wget \
+    gnupg \
+    && locale-gen en_US.UTF-8 \
+    && update-locale LANG=en_US.UTF-8 \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# ── Stage 2: Mozilla apt repo ───────────────────────────────────────────────
+# firefox-esr is a Debian package; Ubuntu 24.04 ships Firefox as a snap which
+# does NOT work inside Docker containers.  Mozilla's official deb repo is the
+# correct fix for Ubuntu 24.04 Docker images.
+RUN install -d -m 0755 /etc/apt/keyrings \
+    && curl -fsSL https://packages.mozilla.org/apt/repo-signing-key.gpg \
+       -o /etc/apt/keyrings/packages.mozilla.org.asc \
+    && echo "deb [signed-by=/etc/apt/keyrings/packages.mozilla.org.asc] \
+https://packages.mozilla.org/apt mozilla main" \
+       > /etc/apt/sources.list.d/mozilla.list \
+    && printf 'Package: *\nPin: origin packages.mozilla.org\nPin-Priority: 1000\n' \
+       > /etc/apt/preferences.d/mozilla
+
+# ── Stage 3: full package install ───────────────────────────────────────────
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    # Desktop
+    xfce4 \
+    xfce4-goodies \
+    xfce4-terminal \
+    xfce4-taskmanager \
+    # VNC (tigervnc provides Xvnc binary; more reliable on 24.04 than tightvnc)
+    tigervnc-standalone-server \
+    tigervnc-tools \
+    # noVNC + bridge
+    novnc \
+    websockify \
+    # X11 helpers
+    dbus-x11 \
+    x11-xserver-utils \
+    x11-utils \
+    xdg-utils \
+    # Browser – resolved from Mozilla apt repo added in Stage 2
+    firefox-esr \
+    # Web server
+    nginx \
+    # Process manager
+    supervisor \
+    # Python runtime
+    python3 \
+    python3-pip \
+    python3-venv \
+    # Shell tools
+    nano \
+    htop \
+    git \
+    unzip \
+    zip \
+    net-tools \
+    procps \
+    sudo \
+    && apt-get autoremove -y \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+# ── Create ubuntu user ───────────────────────────────────────────────────────
+RUN useradd -m -s /bin/bash -u 1000 ubuntu \
+    && echo "ubuntu:ubuntu" | chpasswd \
+    && echo "ubuntu ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers \
+    && mkdir -p /tmp/runtime-ubuntu \
+    && chown ubuntu:ubuntu /tmp/runtime-ubuntu \
+    && chmod 700 /tmp/runtime-ubuntu
+
+# ── Python dependencies ──────────────────────────────────────────────────────
+COPY requirements.txt /tmp/requirements.txt
+RUN pip3 install --break-system-packages --no-cache-dir -r /tmp/requirements.txt
+
+# ── Application files ────────────────────────────────────────────────────────
+RUN mkdir -p /app
+COPY app.py         /app/app.py
+COPY healthcheck.py /app/healthcheck.py
+
+# ── Config files ─────────────────────────────────────────────────────────────
+COPY supervisord.conf /etc/supervisor/conf.d/desktop.conf
+COPY nginx.conf       /etc/nginx/sites-available/default
+
+# ── Shell scripts ────────────────────────────────────────────────────────────
+COPY start.sh          /start.sh
+COPY setup_storage.sh  /setup_storage.sh
+COPY setup_ubuntu.sh   /setup_ubuntu.sh
+COPY setup_vnc.sh      /setup_vnc.sh
+
+RUN chmod +x /start.sh /setup_storage.sh /setup_ubuntu.sh /setup_vnc.sh
+
+# ── Remove default nginx site if it conflicts ────────────────────────────────
+RUN rm -f /etc/nginx/sites-enabled/default \
+    && ln -s /etc/nginx/sites-available/default /etc/nginx/sites-enabled/default
+
+# ── Expose HF Spaces port ────────────────────────────────────────────────────
+EXPOSE 7860
+
+# ── Health check ─────────────────────────────────────────────────────────────
+HEALTHCHECK --interval=30s --timeout=10s --start-period=90s --retries=3 \
+    CMD python3 /app/healthcheck.py
+
+# ── Entry point ──────────────────────────────────────────────────────────────
+CMD ["/start.sh"]

IMPROVED_PROMPT.md

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+# Improved Prompt: Ubuntu Desktop on Hugging Face Spaces
+
+---
+
+## What Changed & Why
+
+The original prompt was good but had several gaps that would cause an LLM to generate
+broken or incomplete code. Below is the improved version, followed by a diff-style
+notes section.
+
+---
+
+## ✅ Improved Prompt
+
+---
+
+### Goal
+
+Build a fully working **Docker-based Hugging Face Space** that serves an Ubuntu 24.04
+XFCE desktop in the browser via noVNC — no manual setup, directly deployable.
+
+---
+
+### Runtime Stack (be explicit)
+
+| Layer | Chosen tool | Why |
+|---|---|---|
+| Base image | `ubuntu:24.04` | LTS, matches target |
+| VNC server | **tigervnc-standalone-server** (`Xvnc` binary) | tightvncserver is a Perl wrapper that forks and daemonises itself; tigervnc runs in foreground — required for supervisor to manage it cleanly |
+| noVNC static files | `novnc` apt package | `/usr/share/novnc/` |
+| WebSocket bridge | `websockify` | Bridges noVNC WS to VNC TCP |
+| Web server | `nginx` on **port 7860** | HF Spaces only exposes 7860 externally |
+| Desktop | XFCE4 | Low RAM; works headless |
+| Dashboard | Flask + psutil | Simple stats UI |
+| Process manager | `supervisord` | Manages all 5 processes; restarts on crash |
+
+---
+
+### Critical Hugging Face Spaces constraints
+
+These must be respected — a naive implementation breaks in all of them:
+
+1. **Port**: The container MUST listen on **port 7860**. HF does not expose any other port.
+2. **WebSocket path**: The noVNC launcher page must derive `host`, `port`, and `path`
+   **dynamically from `window.location`** in JavaScript. Hard-coded URLs break because
+   every Space has a unique subdomain (`username-spacename.hf.space`) and all traffic
+   comes in on port 443 externally (mapped to 7860 internally via Cloudflare).
+3. **Persistent storage**: HF mounts `/data` only if **Persistent Storage is enabled**
+   in Space settings. The code must handle the case where `/data` does not exist
+   (create an in-container fallback) and log a warning.
+4. **Space sleeping**: Free CPU Spaces sleep after ~15 min of no browser traffic.
+   This is expected and acceptable. Do NOT try to fight it with background polling
+   (violates HF ToS). The `HEALTHCHECK` in the Dockerfile keeps the container
+   internally healthy; sleeping is controlled by HF's infrastructure.
+5. **Supervisor + Xvnc**: Xvnc must run in **foreground** (supervisord manages it).
+   Never use `tightvncserver` or `vncserver` wrapper scripts — they fork and exit,
+   making supervisor think the process died.
+
+---
+
+### Files to generate (13 total)
+
+Generate **complete, production-ready** source for every file. No placeholders,
+no `# TODO` comments, no `...` ellipsis. Every file must be runnable as-is.
+
+| File | Purpose |
+|---|---|
+| `Dockerfile` | Multi-stage aware; installs all packages; sets up user; runs `start.sh` |
+| `start.sh` | Entrypoint: calls setup scripts in order, then `exec supervisord` |
+| `setup_storage.sh` | Creates `/data` directory tree; logs warning if `/data` is missing |
+| `setup_ubuntu.sh` | Configures ubuntu user env; symlinks home dirs to `/data` |
+| `setup_vnc.sh` | Writes `/data/vnc/xstartup` for XFCE; optional VNC password from env |
+| `supervisord.conf` | Manages: `xvnc`, `xfce4`, `websockify`, `dashboard`, `nginx` |
+| `nginx.conf` | Port 7860 → routes `/websockify` (WS), `/vnc/` (static), `/dashboard`, `/api/`, `/` (launcher HTML) |
+| `app.py` | Flask: `/dashboard` (HTML), `/api/stats` (JSON), `/api/logs/<name>`, `/api/restart/<name>`, `/health` |
+| `healthcheck.py` | TCP-checks ports 7860, 6080, 5901, 5000; used by Docker HEALTHCHECK |
+| `requirements.txt` | `flask>=3.0.0` and `psutil>=5.9.0` only |
+| `README.md` | Deployment steps, architecture diagram, troubleshooting, persistent storage guide |
+| `.dockerignore` | Excludes `.git`, docs, Python cache, IDE files |
+| `.gitignore` | Standard Python + editor ignores |
+
+---
+
+### `/data` directory layout
+
+```
+/data/
+├── home/               ← ubuntu user $HOME (symlinked from /home/ubuntu)
+│   ├── .config/xfce4/  ← XFCE session config (persists themes, panels)
+│   ├── Desktop/        ← desktop shortcuts
+│   └── Downloads/      ← symlinked to /data/downloads
+├── workspace/          ← user project files
+├── downloads/          ← browser + wget downloads
+├── firefox/            ← Firefox profile (symlinked from ~/.mozilla/firefox)
+├── vnc/                ← VNC state: xstartup, .Xauthority, optional passwd
+├── logs/               ← all supervisor + service logs
+└── cache/              ← XDG_CACHE_HOME
+```
+
+---
+
+### Service startup order (supervisor priority)
+
+```
+100  xvnc       ← must start first (creates :1 display)
+200  xfce4      ← sleep 2s then dbus-launch startxfce4 on DISPLAY=:1
+300  websockify ← bridges localhost:5901 ↔ WS :6080
+400  dashboard  ← Flask on localhost:5000
+500  nginx      ← public-facing on :7860
+```
+
+Each must have `autorestart=true`, `startretries=10`, and per-service log files
+under `/data/logs/`.
+
+---
+
+### noVNC launcher page (critical detail)
+
+The root URL (`/`) must return an HTML page with this JavaScript logic:
+
+```javascript
+const host   = window.location.hostname;
+const port   = window.location.port || (location.protocol === 'https:' ? '443' : '80');
+const params = new URLSearchParams({
+  host, port,
+  path:          'websockify',
+  autoconnect:   'true',
+  reconnect:     'true',
+  reconnect_delay: '3000',
+  resize:        'scale',
+  quality:       '6',
+  compression:   '2',
+});
+window.location.href = `/vnc/vnc.html?${params}`;
+```
+
+This ensures the correct `wss://` WebSocket URL is constructed regardless of
+the Space's subdomain.
+
+---
+
+### Dashboard requirements (app.py)
+
+- Dark-themed single-page HTML served inline (no separate template files)
+- Stats cards: CPU %, RAM (used/total GB + %), Disk `/data` (used/total GB + %), session uptime
+- Services table: name, status badge (Running/Stopped/other), PID, Restart button
+- Log viewer: dropdown to pick service log, last 100 lines, auto-scroll toggle, 5s live refresh toggle
+- All stats polled via `/api/stats` every 5 seconds with `fetch()`
+- Restart POSTs to `/api/restart/<name>` which calls `supervisorctl restart <name>`
+
+---
+
+### Performance targets (free CPU tier)
+
+| Metric | Target |
+|---|---|
+| Idle RAM | < 450 MB |
+| Startup time | < 90 seconds |
+| VNC resolution | 1280×720 |
+| Colour depth | 16-bit |
+| nginx workers | 1 |
+| worker_connections | 256 |
+
+---
+
+### Output format
+
+- Output each file in a separate fenced code block labelled with the filename
+- Include a brief (1–2 sentence) comment block at the top of each file explaining its role
+- No extra prose between files once generation starts
+
+---
+
+## 🔍 What the Original Prompt Was Missing
+
+| Gap | Impact | Fix in improved prompt |
+|---|---|---|
+| Used "TightVNCServer" | tightvncserver daemonises itself; supervisor thinks it crashed and restart-loops | Specified tigervnc `Xvnc` binary in foreground |
+| No mention of port 7860 constraint | LLM might expose port 80 or 443 which don't work on HF | Explicitly stated under "Critical constraints" |
+| Hard-coded noVNC URL | Breaks on any Space URL (every Space has a unique subdomain) | Specified dynamic `window.location`-based URL construction |
+| `/data` missing fallback | If user forgets to enable Persistent Storage, container panics | Specified graceful fallback with warning |
+| "Prevent instant Space pausing" with no method | LLM might generate polling scripts that violate HF ToS | Clarified sleep is expected; HEALTHCHECK keeps container healthy |
+| No supervisor priority/ordering | Xvnc might not be ready when XFCE4 starts → black screen | Explicit priority table with sleep 2s in xfce4 command |
+| No WebSocket nginx config details | LLM often forgets `Upgrade`/`Connection` headers → WS 502 | Explicit nginx WS proxy headers required |
+| Dashboard only described as "Flask" | LLM generates skeleton with no real content | Full functional spec: routes, polling interval, log allowlist |
+| "Use low RAM" vague | No concrete targets | Explicit RAM/startup/nginx worker targets |

README.md

@@ -1,13 +1,216 @@
 ---
-title: D
-emoji: 😻
-colorFrom: gray
-colorTo: pink
-sdk: gradio
-sdk_version: 6.14.0
-python_version: '3.13'
-app_file: app.py
+title: Ubuntu Desktop
+emoji: 🐧
+colorFrom: indigo
+colorTo: blue
+sdk: docker
 pinned: false
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# 🐧 Ubuntu Desktop on Hugging Face Spaces
+
+A browser-accessible **Ubuntu 24.04 XFCE Desktop** running on a free Hugging Face
+Docker Space — inspired by Android Termux + PRoot-Distro workflows, adapted for
+cloud deployment with zero manual setup.
+
+---
+
+## ✨ What You Get
+
+| Feature | Detail |
+|---|---|
+| **Desktop** | Ubuntu 24.04 + XFCE4, accessible from any browser |
+| **VNC** | TigerVNC (Xvnc) at 1280×720, 16-bit colour, 24 FPS |
+| **Browser Access** | noVNC via WebSocket — no VNC client needed |
+| **Persistent Storage** | All data stored in `/data` — survives Space restarts |
+| **Dashboard** | Flask app with live CPU / RAM / disk stats + log viewer |
+| **Browser** | Firefox ESR pre-installed |
+| **Free CPU Tier** | Optimised for low RAM + CPU (≈ 400 MB idle) |
+
+---
+
+## 🚀 Deployment to Hugging Face Spaces
+
+### Prerequisites
+
+- A [Hugging Face](https://huggingface.co) account
+- Git installed locally (or use the HF web UI)
+
+### Step 1 — Create a new Space
+
+1. Go to **huggingface.co/new-space**
+2. Choose **Docker** as the Space SDK
+3. Set hardware to **CPU Basic** (free tier)
+4. Enable **Persistent Storage** in the Space settings (required for `/data`)
+
+### Step 2 — Upload the files
+
+Either use the HF web editor to paste each file, or clone the Space repo and push:
+
+```bash
+git clone https://huggingface.co/spaces/<YOUR_USERNAME>/<YOUR_SPACE_NAME>
+cd <YOUR_SPACE_NAME>
+
+# Copy all project files here
+cp -r /path/to/hf-ubuntu-space/* .
+
+git add .
+git commit -m "Initial Ubuntu Desktop Space"
+git push
+```
+
+### Step 3 — Wait for the build
+
+The first build takes **5–8 minutes** (downloading Ubuntu + XFCE packages).
+Watch the **Build Logs** tab in the Space UI.
+
+### Step 4 — Access your desktop
+
+Once the Space shows **Running**, click the **App** tab, or open:
+
+```
+https://<username>-<spacename>.hf.space
+```
+
+Click **🖥 Launch Desktop** to open the noVNC browser desktop.
+
+---
+
+## 🖥 Browser Desktop Access
+
+| URL | Purpose |
+|---|---|
+| `https://…hf.space/` | Launcher page (recommended) |
+| `https://…hf.space/vnc/vnc.html` | noVNC direct (raw interface) |
+| `https://…hf.space/dashboard` | System stats dashboard |
+
+The launcher page auto-detects your Space's hostname and builds the correct
+WebSocket URL for noVNC — this is important because HF Spaces use Cloudflare
+proxying where the port is always 443 externally.
+
+### Mobile browsers
+
+noVNC works on mobile. Use the scale/resize button (⤢) in the noVNC toolbar
+to fit the 1280×720 desktop to your screen.
+
+---
+
+## 💾 Persistent Storage
+
+All state lives under `/data` (Hugging Face's persistent volume):
+
+```
+/data/
+├── home/          ← ubuntu user home (~/.bashrc, Desktop, etc.)
+├── workspace/     ← your project files (persists forever)
+├── downloads/     ← browser and wget downloads
+├── firefox/       ← Firefox profile (bookmarks, passwords, etc.)
+├── xfce/          ← XFCE session config, wallpaper, themes
+├── vnc/           ← VNC server state + xstartup
+├── logs/          ← all service logs
+└── cache/         ← app-level cache
+```
+
+> **Note:** You must enable **Persistent Storage** in your Space settings.
+> Without it `/data` is ephemeral and resets on every restart.
+
+---
+
+## ⚙️ PRoot-Distro Similarities
+
+This Space simulates the Termux + PRoot-Distro workflow:
+
+| Termux / PRoot | This Space |
+|---|---|
+| `pkg install proot-distro` | Base Docker layer |
+| `proot-distro install ubuntu` | `FROM ubuntu:24.04` in Dockerfile |
+| `proot-distro login ubuntu` | Container starts automatically |
+| `~` (Termux home) | `/data/home` (persisted) |
+| Internal storage | `/data/workspace` |
+
+The key difference is that this runs Docker natively (not PRoot), giving full
+kernel-level isolation without the overhead of a userspace chroot.
+
+---
+
+## 🔧 Configuration
+
+### Environment variables (set in Space settings)
+
+| Variable | Default | Description |
+|---|---|---|
+| `VNC_PASSWORD` | _(empty)_ | Set a VNC password (optional; localhost-only anyway) |
+| `RESOLUTION` | `1280x720` | Desktop resolution |
+| `COLOR_DEPTH` | `16` | VNC colour depth (16 or 24) |
+
+### Changing resolution
+
+Edit `supervisord.conf`, update the Xvnc command:
+
+```ini
+command=Xvnc :1 -geometry 1920x1080 -depth 24 ...
+```
+
+---
+
+## 🛠 Troubleshooting
+
+### Desktop doesn't load / black screen
+
+1. Open the **Dashboard** → check all services show **Running**
+2. Check **Xvnc** and **XFCE4** logs for errors
+3. Try restarting XFCE4 from the dashboard restart button
+
+### "Failed to connect to server" in noVNC
+
+- Make sure you're using the **launcher page** (`/`) not a hard-coded URL
+- The WebSocket path must be `/websockify` — check the URL bar in noVNC shows the correct host
+
+### Space keeps sleeping
+
+HF free CPU Spaces sleep after ~15 min of no browser traffic. This is expected.
+Wake it by opening the Space URL. Your `/data` files are always preserved.
+
+### High memory usage
+
+XFCE4 uses ~300–400 MB at idle. With Firefox open, expect 800 MB+. The free
+CPU tier has 16 GB RAM, so this is fine. If you see OOM kills, close unused
+browser tabs in the desktop.
+
+### Logs
+
+All logs are in `/data/logs/` and viewable from the Dashboard log viewer:
+
+```
+/data/logs/supervisord.log
+/data/logs/xvnc.log / xvnc_err.log
+/data/logs/xfce4.log / xfce4_err.log
+/data/logs/websockify.log
+/data/logs/dashboard.log
+/data/logs/nginx.log / nginx_error.log
+```
+
+---
+
+## 🏗 Architecture
+
+```
+Browser (HTTPS :443)
+    │
+    ▼
+nginx :7860 (HF Spaces default port)
+    ├─ / ──────────────────────── Launcher HTML (auto-builds WSS URL)
+    ├─ /vnc/ ─────────────────── noVNC static assets
+    ├─ /websockify ───────────── WebSocket proxy ──► websockify :6080
+    │                                                       │
+    │                                                    Xvnc :5901
+    │                                                    XFCE4 session
+    ├─ /dashboard ────────────── Flask app :5000
+    └─ /api/ ─────────────────── Flask REST API :5000
+```
+
+---
+
+## 📄 Licence
+
+MIT — use freely, no warranties.

app.py

@@ -0,0 +1,504 @@
+"""
+app.py – Flask dashboard for Ubuntu Desktop on Hugging Face Spaces
+Serves: stats API, log viewer, service restart, and embedded desktop
+"""
+
+import os
+import subprocess
+import time
+import datetime
+import glob
+import json
+from pathlib import Path
+
+import psutil
+from flask import Flask, jsonify, render_template_string, request
+
+app = Flask(__name__)
+START_TIME = time.time()
+
+# ── HTML Template ─────────────────────────────────────────────────────────────
+DASHBOARD_HTML = """<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Ubuntu Space Dashboard</title>
+<style>
+  :root {
+    --bg:       #0d0d1a;
+    --surface:  #141426;
+    --border:   #1e1e3c;
+    --accent:   #6366f1;
+    --accent2:  #22d3ee;
+    --text:     #e2e2f0;
+    --muted:    #6b6b90;
+    --green:    #34d399;
+    --red:      #f87171;
+    --yellow:   #fbbf24;
+    --radius:   10px;
+  }
+  * { margin:0; padding:0; box-sizing:border-box; }
+  body {
+    background: var(--bg);
+    color: var(--text);
+    font-family: 'Segoe UI', system-ui, sans-serif;
+    font-size: 14px;
+    min-height: 100vh;
+  }
+  a { color: var(--accent); text-decoration: none; }
+  a:hover { text-decoration: underline; }
+
+  /* ── Layout ── */
+  .layout  { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
+  .sidebar {
+    background: var(--surface);
+    border-right: 1px solid var(--border);
+    padding: 1.5rem 1rem;
+    display: flex; flex-direction: column; gap: 0.25rem;
+  }
+  .sidebar h2 { font-size: .75rem; color: var(--muted); text-transform: uppercase;
+                letter-spacing: .1em; margin: 1rem 0 .4rem .5rem; }
+  .sidebar a {
+    display: flex; align-items: center; gap: .6rem;
+    padding: .55rem .75rem; border-radius: 7px; color: var(--text);
+    transition: .15s;
+  }
+  .sidebar a:hover, .sidebar a.active { background: var(--border); text-decoration: none; }
+  .brand { font-size: 1.1rem; font-weight: 700; color: var(--accent);
+           margin-bottom: .5rem; padding: .5rem; }
+  .brand span { color: var(--text); }
+  .main  { padding: 1.5rem 2rem; overflow-y: auto; }
+
+  /* ── Header ── */
+  .page-header { display: flex; align-items: center; justify-content: space-between;
+                 margin-bottom: 1.5rem; }
+  .page-header h1 { font-size: 1.25rem; font-weight: 600; }
+  .uptime { font-size: .8rem; color: var(--muted); }
+
+  /* ── Cards grid ── */
+  .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
+           gap: 1rem; margin-bottom: 1.5rem; }
+  .card  {
+    background: var(--surface);
+    border: 1px solid var(--border);
+    border-radius: var(--radius);
+    padding: 1.1rem 1.3rem;
+  }
+  .card-label { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em;
+                color: var(--muted); margin-bottom: .35rem; }
+  .card-value { font-size: 1.6rem; font-weight: 700; line-height: 1; }
+  .card-sub   { font-size: .75rem; color: var(--muted); margin-top: .3rem; }
+  .bar-wrap { margin-top: .6rem; background: var(--border); border-radius: 4px; height: 6px; }
+  .bar-fill { height: 6px; border-radius: 4px; transition: width .4s; }
+
+  /* ── Services table ── */
+  .section { background: var(--surface); border: 1px solid var(--border);
+             border-radius: var(--radius); margin-bottom: 1.5rem; }
+  .section-header { padding: .9rem 1.3rem; border-bottom: 1px solid var(--border);
+                    font-weight: 600; display: flex; align-items: center; gap: .5rem; }
+  table { width: 100%; border-collapse: collapse; }
+  th, td { text-align: left; padding: .75rem 1.3rem; border-bottom: 1px solid var(--border); }
+  th { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
+  tr:last-child td { border-bottom: none; }
+  tr:hover td { background: rgba(99,102,241,.04); }
+
+  /* ── Badges ── */
+  .badge {
+    display: inline-flex; align-items: center; gap: .35rem;
+    padding: .2rem .65rem; border-radius: 20px; font-size: .75rem; font-weight: 600;
+  }
+  .badge-green  { background: rgba(52,211,153,.12); color: var(--green); }
+  .badge-red    { background: rgba(248,113,113,.12); color: var(--red); }
+  .badge-yellow { background: rgba(251,191,36,.12);  color: var(--yellow); }
+  .dot { width:7px; height:7px; border-radius:50%; background:currentColor; }
+
+  /* ── Buttons ── */
+  .btn {
+    padding: .4rem .9rem; border-radius: 6px; border: none; cursor: pointer;
+    font-size: .8rem; font-weight: 600; transition: .15s;
+  }
+  .btn-primary { background: var(--accent); color: #fff; }
+  .btn-primary:hover { background: #5254d4; }
+  .btn-ghost { background: var(--border); color: var(--text); }
+  .btn-ghost:hover { background: #2a2a4e; }
+  .btn-danger { background: rgba(248,113,113,.15); color: var(--red); }
+  .btn-danger:hover { background: rgba(248,113,113,.25); }
+
+  /* ── Log viewer ── */
+  .log-box {
+    background: #060610; border-radius: 0 0 var(--radius) var(--radius);
+    padding: 1rem 1.3rem; font-family: 'JetBrains Mono', 'Fira Code', monospace;
+    font-size: .78rem; color: #9090c0; height: 280px;
+    overflow-y: auto; white-space: pre-wrap; word-break: break-all;
+    scrollbar-width: thin; scrollbar-color: var(--border) transparent;
+  }
+  .log-controls { padding: .75rem 1.3rem; border-bottom: 1px solid var(--border);
+                  display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
+  select { background: var(--border); color: var(--text); border: none;
+           border-radius: 5px; padding: .35rem .6rem; font-size: .8rem; }
+
+  /* ── Launch bar ── */
+  .launch-bar {
+    background: linear-gradient(135deg, rgba(99,102,241,.15), rgba(34,211,238,.08));
+    border: 1px solid rgba(99,102,241,.3);
+    border-radius: var(--radius); padding: 1.3rem 1.5rem;
+    display: flex; align-items: center; justify-content: space-between;
+    margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem;
+  }
+  .launch-bar h2 { font-size: 1rem; font-weight: 600; }
+  .launch-bar p  { font-size: .8rem; color: var(--muted); margin-top: .2rem; }
+
+  /* Responsive */
+  @media (max-width: 640px) {
+    .layout { grid-template-columns: 1fr; }
+    .sidebar { display: none; }
+    .main { padding: 1rem; }
+  }
+</style>
+</head>
+<body>
+<div class="layout">
+
+  <!-- Sidebar -->
+  <aside class="sidebar">
+    <div class="brand">🐧 <span>Ubuntu Space</span></div>
+    <h2>Navigation</h2>
+    <a href="/dashboard" class="active">📊 Dashboard</a>
+    <a href="/" >🖥 Desktop</a>
+    <a href="/vnc/vnc.html" target="_blank">🔗 noVNC Direct</a>
+    <a href="#logs">📄 Logs</a>
+    <h2>Info</h2>
+    <a href="https://huggingface.co/docs/hub/spaces" target="_blank">📖 HF Spaces Docs</a>
+  </aside>
+
+  <!-- Main -->
+  <main class="main">
+    <div class="page-header">
+      <h1>System Dashboard</h1>
+      <span class="uptime" id="uptime-label">Loading…</span>
+    </div>
+
+    <!-- Launch bar -->
+    <div class="launch-bar">
+      <div>
+        <h2>Ubuntu 24.04 XFCE Desktop</h2>
+        <p>PRoot-Distro style isolated environment on Hugging Face Spaces</p>
+      </div>
+      <div style="display:flex;gap:.75rem;flex-wrap:wrap">
+        <a href="/" class="btn btn-primary">🖥 Open Desktop</a>
+        <button class="btn btn-ghost" onclick="refreshAll()">🔄 Refresh</button>
+      </div>
+    </div>
+
+    <!-- Stats cards -->
+    <div class="cards" id="stats-cards">
+      <div class="card">
+        <div class="card-label">CPU Usage</div>
+        <div class="card-value" id="cpu-val">–</div>
+        <div class="bar-wrap"><div class="bar-fill" id="cpu-bar" style="background:var(--accent)"></div></div>
+        <div class="card-sub" id="cpu-cores">–</div>
+      </div>
+      <div class="card">
+        <div class="card-label">Memory</div>
+        <div class="card-value" id="ram-val">–</div>
+        <div class="bar-wrap"><div class="bar-fill" id="ram-bar" style="background:var(--accent2)"></div></div>
+        <div class="card-sub" id="ram-sub">–</div>
+      </div>
+      <div class="card">
+        <div class="card-label">Storage (/data)</div>
+        <div class="card-value" id="disk-val">–</div>
+        <div class="bar-wrap"><div class="bar-fill" id="disk-bar" style="background:var(--green)"></div></div>
+        <div class="card-sub" id="disk-sub">–</div>
+      </div>
+      <div class="card">
+        <div class="card-label">Session Uptime</div>
+        <div class="card-value" id="uptime-val" style="font-size:1.2rem">–</div>
+        <div class="card-sub">Space started</div>
+      </div>
+    </div>
+
+    <!-- Services -->
+    <div class="section">
+      <div class="section-header">⚙️ Services</div>
+      <table>
+        <thead>
+          <tr><th>Service</th><th>Status</th><th>PID</th><th>Action</th></tr>
+        </thead>
+        <tbody id="services-tbody">
+          <tr><td colspan="4" style="color:var(--muted);text-align:center;padding:1.5rem">Loading…</td></tr>
+        </tbody>
+      </table>
+    </div>
+
+    <!-- Log viewer -->
+    <div class="section" id="logs">
+      <div class="section-header">📄 Logs</div>
+      <div class="log-controls">
+        <select id="log-select">
+          <option value="supervisord">supervisord</option>
+          <option value="xvnc">Xvnc</option>
+          <option value="xfce4">XFCE4</option>
+          <option value="websockify">websockify</option>
+          <option value="dashboard">dashboard</option>
+          <option value="nginx">nginx</option>
+        </select>
+        <button class="btn btn-ghost" onclick="loadLog()">🔃 Reload</button>
+        <label style="display:flex;align-items:center;gap:.4rem;font-size:.8rem;color:var(--muted)">
+          <input type="checkbox" id="auto-scroll" checked> Auto-scroll
+        </label>
+        <label style="display:flex;align-items:center;gap:.4rem;font-size:.8rem;color:var(--muted)">
+          <input type="checkbox" id="auto-refresh-log"> Live (5s)
+        </label>
+      </div>
+      <div class="log-box" id="log-box">Select a log file above…</div>
+    </div>
+
+  </main>
+</div>
+
+<script>
+let logRefreshTimer = null;
+
+// ── Fetch stats ──────────────────────────────────────────────
+async function fetchStats() {
+  try {
+    const r = await fetch('/api/stats');
+    const d = await r.json();
+
+    // CPU
+    document.getElementById('cpu-val').textContent = d.cpu.percent + '%';
+    document.getElementById('cpu-bar').style.width  = d.cpu.percent + '%';
+    document.getElementById('cpu-cores').textContent = `${d.cpu.count} cores`;
+
+    // RAM
+    const ramPct = d.memory.percent;
+    document.getElementById('ram-val').textContent = ramPct + '%';
+    document.getElementById('ram-bar').style.width  = ramPct + '%';
+    document.getElementById('ram-sub').textContent  =
+      `${d.memory.used_gb} / ${d.memory.total_gb} GB`;
+
+    // Disk
+    const diskPct = d.disk.percent;
+    document.getElementById('disk-val').textContent = diskPct + '%';
+    document.getElementById('disk-bar').style.width  = diskPct + '%';
+    document.getElementById('disk-sub').textContent  =
+      `${d.disk.used_gb} / ${d.disk.total_gb} GB`;
+
+    // Uptime
+    document.getElementById('uptime-val').textContent = d.uptime.human;
+    document.getElementById('uptime-label').textContent = 'Uptime: ' + d.uptime.human;
+
+    // Services
+    renderServices(d.services);
+  } catch(e) {
+    console.error('Stats fetch failed:', e);
+  }
+}
+
+function badgeFor(state) {
+  if (state === 'RUNNING') return '<span class="badge badge-green"><span class="dot"></span>Running</span>';
+  if (state === 'STOPPED') return '<span class="badge badge-red"><span class="dot"></span>Stopped</span>';
+  return `<span class="badge badge-yellow"><span class="dot"></span>${state}</span>`;
+}
+
+function renderServices(services) {
+  const tbody = document.getElementById('services-tbody');
+  tbody.innerHTML = services.map(s => `
+    <tr>
+      <td><strong>${s.name}</strong><br><small style="color:var(--muted)">${s.description}</small></td>
+      <td>${badgeFor(s.state)}</td>
+      <td style="font-family:monospace;color:var(--muted)">${s.pid || '—'}</td>
+      <td>
+        <button class="btn btn-ghost" onclick="restartService('${s.name}')">↺ Restart</button>
+      </td>
+    </tr>
+  `).join('');
+}
+
+async function restartService(name) {
+  if (!confirm(`Restart ${name}?`)) return;
+  try {
+    const r = await fetch(`/api/restart/${name}`, { method: 'POST' });
+    const d = await r.json();
+    alert(d.message || d.error);
+    setTimeout(fetchStats, 1500);
+  } catch(e) {
+    alert('Restart failed: ' + e);
+  }
+}
+
+// ── Fetch logs ───────────────────────────────────────────────
+async function loadLog() {
+  const name = document.getElementById('log-select').value;
+  try {
+    const r = await fetch(`/api/logs/${name}`);
+    const d = await r.json();
+    const box = document.getElementById('log-box');
+    box.textContent = d.content || '(empty)';
+    if (document.getElementById('auto-scroll').checked)
+      box.scrollTop = box.scrollHeight;
+  } catch(e) {
+    document.getElementById('log-box').textContent = 'Error loading log: ' + e;
+  }
+}
+
+document.getElementById('log-select').addEventListener('change', loadLog);
+document.getElementById('auto-refresh-log').addEventListener('change', function() {
+  clearInterval(logRefreshTimer);
+  if (this.checked) logRefreshTimer = setInterval(loadLog, 5000);
+});
+
+function refreshAll() { fetchStats(); loadLog(); }
+
+// ── Poll stats every 5 s ──────────────────────────────────────
+fetchStats();
+loadLog();
+setInterval(fetchStats, 5000);
+</script>
+</body>
+</html>"""
+
+
+# ── Helpers ───────────────────────────────────────────────────────────────────
+
+def _supervisor_ctl(*args) -> str:
+    try:
+        result = subprocess.run(
+            ["supervisorctl"] + list(args),
+            capture_output=True, text=True, timeout=10
+        )
+        return result.stdout + result.stderr
+    except Exception as e:
+        return str(e)
+
+
+def _supervisor_status() -> list[dict]:
+    """Parse `supervisorctl status` into structured list."""
+    output = _supervisor_ctl("status")
+    services = []
+    descriptions = {
+        "xvnc":       "Virtual framebuffer + VNC server",
+        "xfce4":      "XFCE4 desktop session",
+        "websockify":  "noVNC ↔ VNC WebSocket bridge",
+        "dashboard":   "Flask stats dashboard",
+        "nginx":       "Reverse proxy (port 7860)",
+    }
+    for line in output.strip().splitlines():
+        if not line.strip():
+            continue
+        parts = line.split()
+        if len(parts) < 2:
+            continue
+        name  = parts[0]
+        state = parts[1]
+        pid   = None
+        for p in parts:
+            if p.startswith("pid"):
+                try:
+                    pid = parts[parts.index(p) + 1].rstrip(",")
+                except Exception:
+                    pass
+        services.append({
+            "name":        name,
+            "state":       state,
+            "pid":         pid,
+            "description": descriptions.get(name, ""),
+        })
+    return services
+
+
+def _human_uptime(seconds: float) -> str:
+    d = int(seconds // 86400)
+    h = int((seconds % 86400) // 3600)
+    m = int((seconds % 3600) // 60)
+    s = int(seconds % 60)
+    if d:
+        return f"{d}d {h}h {m}m"
+    if h:
+        return f"{h}h {m}m {s}s"
+    return f"{m}m {s}s"
+
+
+# ── Routes ────────────────────────────────────────────────────────────────────
+
+@app.route("/dashboard")
+def dashboard():
+    return render_template_string(DASHBOARD_HTML)
+
+
+@app.route("/health")
+def health():
+    return jsonify({"status": "ok", "ts": datetime.datetime.utcnow().isoformat()})
+
+
+@app.route("/api/stats")
+def api_stats():
+    cpu   = psutil.cpu_percent(interval=0.3)
+    mem   = psutil.virtual_memory()
+    try:
+        disk = psutil.disk_usage("/data")
+        disk_data = {
+            "percent":  disk.percent,
+            "used_gb":  round(disk.used  / 1e9, 2),
+            "total_gb": round(disk.total / 1e9, 2),
+            "free_gb":  round(disk.free  / 1e9, 2),
+        }
+    except Exception:
+        disk_data = {"percent": 0, "used_gb": 0, "total_gb": 0, "free_gb": 0}
+
+    uptime_secs = time.time() - START_TIME
+
+    return jsonify({
+        "cpu": {
+            "percent": round(cpu, 1),
+            "count":   psutil.cpu_count(),
+        },
+        "memory": {
+            "percent":  mem.percent,
+            "used_gb":  round(mem.used   / 1e9, 2),
+            "total_gb": round(mem.total  / 1e9, 2),
+            "free_gb":  round(mem.available / 1e9, 2),
+        },
+        "disk":    disk_data,
+        "uptime": {
+            "seconds": round(uptime_secs),
+            "human":   _human_uptime(uptime_secs),
+        },
+        "services": _supervisor_status(),
+        "ts": datetime.datetime.utcnow().isoformat(),
+    })
+
+
+@app.route("/api/logs/<name>")
+def api_logs(name: str):
+    # Allowlist to prevent path traversal
+    allowed = {"supervisord", "xvnc", "xfce4", "websockify", "dashboard", "nginx",
+               "xvnc_err", "xfce4_err", "websockify_err", "dashboard_err", "nginx_err"}
+    if name not in allowed:
+        return jsonify({"error": "Unknown log name"}), 400
+
+    log_path = Path(f"/data/logs/{name}.log")
+    if not log_path.exists():
+        return jsonify({"content": f"Log file not found: {log_path}"})
+
+    try:
+        # Return last 100 lines
+        lines = log_path.read_text(errors="replace").splitlines()
+        return jsonify({"content": "\n".join(lines[-100:])})
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+
+@app.route("/api/restart/<name>", methods=["POST"])
+def api_restart(name: str):
+    allowed = {"xvnc", "xfce4", "websockify", "dashboard", "nginx"}
+    if name not in allowed:
+        return jsonify({"error": "Unknown service"}), 400
+    out = _supervisor_ctl("restart", name)
+    return jsonify({"message": out.strip()})
+
+
+# ── Entry point ───────────────────────────────────────────────────────────────
+if __name__ == "__main__":
+    app.run(host="127.0.0.1", port=5000, debug=False, threaded=True)

healthcheck.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+"""
+healthcheck.py – Docker HEALTHCHECK script
+Verifies that all critical services are alive.
+Exit 0 = healthy, Exit 1 = unhealthy.
+"""
+
+import sys
+import socket
+import subprocess
+
+CHECKS = [
+    ("nginx",       "tcp", "127.0.0.1", 7860),
+    ("websockify",  "tcp", "127.0.0.1", 6080),
+    ("dashboard",   "tcp", "127.0.0.1", 5000),
+    ("Xvnc",        "tcp", "127.0.0.1", 5901),
+]
+
+
+def tcp_alive(host: str, port: int, timeout: float = 3.0) -> bool:
+    try:
+        with socket.create_connection((host, port), timeout=timeout):
+            return True
+    except OSError:
+        return False
+
+
+def supervisord_alive() -> bool:
+    try:
+        result = subprocess.run(
+            ["supervisorctl", "status"],
+            capture_output=True, text=True, timeout=5
+        )
+        return result.returncode == 0
+    except Exception:
+        return False
+
+
+def main() -> int:
+    failures = []
+
+    # Check supervisor itself
+    if not supervisord_alive():
+        failures.append("supervisord not responding")
+
+    # Check TCP ports
+    for name, kind, host, port in CHECKS:
+        if not tcp_alive(host, port):
+            failures.append(f"{name} not listening on port {port}")
+
+    if failures:
+        for f in failures:
+            print(f"UNHEALTHY: {f}", file=sys.stderr)
+        return 1
+
+    print("HEALTHY: all services up")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

nginx.conf

@@ -0,0 +1,169 @@
+# ============================================================
+# nginx.conf – Reverse proxy for Ubuntu Desktop Space
+# Port 7860 (HF Spaces default) routes:
+#   /          → noVNC launcher (auto-connect to desktop)
+#   /vnc/      → noVNC static assets
+#   /websockify → WebSocket bridge to VNC (via websockify:6080)
+#   /dashboard  → Flask stats dashboard (port 5000)
+#   /api/       → Flask REST API (port 5000)
+# ============================================================
+
+# Reduce worker count for free CPU tier
+worker_processes 1;
+worker_rlimit_nofile 1024;
+
+events {
+    worker_connections 256;
+    use epoll;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    # Logging → /data/logs
+    access_log /data/logs/nginx_access.log combined buffer=32k flush=5s;
+    error_log  /data/logs/nginx_error.log warn;
+
+    # Performance
+    sendfile        on;
+    tcp_nopush      on;
+    tcp_nodelay     on;
+    keepalive_timeout 65;
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;
+
+    # Upstreams
+    upstream novnc_ws {
+        server 127.0.0.1:6080;
+        keepalive 4;
+    }
+
+    upstream dashboard {
+        server 127.0.0.1:5000;
+        keepalive 4;
+    }
+
+    server {
+        listen 7860 default_server;
+        server_name _;
+
+        # Large proxy timeouts for persistent VNC sessions
+        proxy_read_timeout  3600s;
+        proxy_send_timeout  3600s;
+        proxy_connect_timeout 10s;
+        proxy_buffering off;
+
+        # ── noVNC static assets ──────────────────────────────────────────
+        location /vnc/ {
+            alias /usr/share/novnc/;
+            expires 1h;
+            add_header Cache-Control "public, immutable";
+        }
+
+        # ── WebSocket bridge (noVNC ↔ VNC) ──────────────────────────────
+        # noVNC connects to wss://host/websockify
+        location /websockify {
+            proxy_pass http://novnc_ws/;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade    $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host       $host;
+            proxy_set_header X-Real-IP  $remote_addr;
+            proxy_read_timeout  3600s;
+            proxy_send_timeout  3600s;
+        }
+
+        # ── Flask dashboard ──────────────────────────────────────────────
+        location /dashboard {
+            proxy_pass http://dashboard/dashboard;
+            proxy_set_header Host       $host;
+            proxy_set_header X-Real-IP  $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+
+        # ── Flask REST API ───────────────────────────────────────────────
+        location /api/ {
+            proxy_pass http://dashboard/api/;
+            proxy_set_header Host       $host;
+            proxy_set_header X-Real-IP  $remote_addr;
+        }
+
+        # ── Root: serve launcher page ────────────────────────────────────
+        # A small HTML page that auto-connects noVNC using the *current*
+        # browser host, so it works on any HF Space URL.
+        location = / {
+            return 200 '<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Ubuntu Desktop – Hugging Face Space</title>
+<style>
+  * { margin:0; padding:0; box-sizing:border-box; }
+  body { background:#0f0f1a; color:#e0e0ff; font-family: system-ui, sans-serif;
+         display:flex; flex-direction:column; align-items:center;
+         justify-content:center; height:100vh; gap:1.5rem; }
+  h1   { font-size:1.6rem; font-weight:600; }
+  p    { color:#888; font-size:.9rem; }
+  .btn { padding:.75rem 2rem; border-radius:8px; font-size:1rem;
+         font-weight:600; cursor:pointer; text-decoration:none;
+         border:none; transition:.2s; }
+  .primary  { background:#5b5bf0; color:#fff; }
+  .primary:hover  { background:#4a4adc; }
+  .secondary{ background:#1e1e3a; color:#9090ff; border:1px solid #5b5bf0; }
+  .secondary:hover{ background:#2a2a50; }
+  .btns { display:flex; gap:1rem; flex-wrap:wrap; justify-content:center; }
+  .tag  { background:#1e1e3a; border-radius:20px; padding:.3rem .9rem;
+          font-size:.8rem; color:#7070ff; border:1px solid #2e2e5e; }
+  .tags { display:flex; gap:.5rem; flex-wrap:wrap; justify-content:center; }
+</style>
+</head>
+<body>
+  <h1>🐧 Ubuntu 24.04 Desktop</h1>
+  <div class="tags">
+    <span class="tag">XFCE4</span>
+    <span class="tag">noVNC</span>
+    <span class="tag">Firefox ESR</span>
+    <span class="tag">PRoot-Style</span>
+    <span class="tag">Persistent /data</span>
+  </div>
+  <p>Browser-accessible Ubuntu desktop running on Hugging Face Spaces.</p>
+  <div class="btns">
+    <a id="vnc-btn" class="btn primary" href="#">🖥 Launch Desktop</a>
+    <a href="/dashboard" class="btn secondary">📊 Dashboard</a>
+  </div>
+  <p id="status" style="color:#666;font-size:.8rem">Connecting…</p>
+<script>
+  // Build noVNC URL using current window host so it works on any HF Space URL
+  const host = window.location.hostname;
+  const port = window.location.port || (window.location.protocol === "https:" ? "443" : "80");
+  const proto = window.location.protocol === "https:" ? "wss" : "ws";
+  const params = new URLSearchParams({
+    host, port,
+    path: "websockify",
+    autoconnect: "true",
+    reconnect: "true",
+    reconnect_delay: "3000",
+    resize: "scale",
+    quality: "6",
+    compression: "2",
+    show_dot: "false"
+  });
+  const vncUrl = `/vnc/vnc.html?${params}`;
+  document.getElementById("vnc-btn").href = vncUrl;
+  document.getElementById("status").textContent = `WebSocket target: ${proto}://${host}:${port}/websockify`;
+</script>
+</body>
+</html>';
+            add_header Content-Type "text/html; charset=utf-8";
+        }
+
+        # ── Health probe (used by HF and Docker HEALTHCHECK) ─────────────
+        location = /health {
+            proxy_pass http://dashboard/health;
+            access_log off;
+        }
+    }
+}

requirements.txt

@@ -0,0 +1,3 @@
+# ── Flask dashboard dependencies ──────────────────────────────────────────────
+flask>=3.0.0
+psutil>=5.9.0

setup_storage.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+# ============================================================
+# setup_storage.sh – Create /data directory structure
+# All state lives here so it survives HF Space restarts
+# ============================================================
+set -euo pipefail
+
+log() { echo "[STORAGE] $*"; }
+
+# ── Directory layout ─────────────────────────────────────────
+declare -a DIRS=(
+    /data/home          # ubuntu user home (replaces /home/ubuntu)
+    /data/home/.config  # XDG config
+    /data/home/.local/share
+    /data/home/Desktop
+    /data/home/Downloads
+    /data/home/.mozilla/firefox
+    /data/workspace     # user project files
+    /data/vnc           # VNC server state + xstartup
+    /data/firefox       # persistent Firefox profile
+    /data/xfce          # XFCE session config
+    /data/downloads     # download folder
+    /data/logs          # all service logs
+    /data/cache         # app cache
+)
+
+for dir in "${DIRS[@]}"; do
+    if [ ! -d "$dir" ]; then
+        mkdir -p "$dir"
+        log "Created $dir"
+    fi
+done
+
+# ── Permissions ──────────────────────────────────────────────
+chown -R ubuntu:ubuntu /data
+chmod 755 /data
+chmod 700 /data/vnc  # VNC passwd must be protected
+
+log "Persistent storage ready."

setup_ubuntu.sh

@@ -0,0 +1,95 @@
+#!/bin/bash
+# ============================================================
+# setup_ubuntu.sh – Configure ubuntu user environment
+# Symlinks home dirs to /data so they persist across restarts
+# ============================================================
+set -euo pipefail
+
+log() { echo "[UBUNTU] $*"; }
+
+export HOME=/data/home
+export USER=ubuntu
+
+# ── Symlink Downloads → /data/downloads ─────────────────────
+DOWNLOADS_LINK=/data/home/Downloads
+if [ -d "$DOWNLOADS_LINK" ] && [ ! -L "$DOWNLOADS_LINK" ]; then
+    # First run: real dir exists – migrate contents and replace with symlink
+    cp -rn "$DOWNLOADS_LINK/." /data/downloads/ 2>/dev/null || true
+    rm -rf "$DOWNLOADS_LINK"
+fi
+if [ ! -L "$DOWNLOADS_LINK" ]; then
+    ln -sf /data/downloads "$DOWNLOADS_LINK"
+    log "Symlinked Downloads → /data/downloads"
+fi
+
+# ── Symlink Firefox profile → /data/firefox ──────────────────
+FIREFOX_DIR=/data/home/.mozilla/firefox
+if [ -d "$FIREFOX_DIR" ] && [ ! -L "$FIREFOX_DIR" ]; then
+    cp -rn "$FIREFOX_DIR/." /data/firefox/ 2>/dev/null || true
+    rm -rf "$FIREFOX_DIR"
+fi
+if [ ! -L "$FIREFOX_DIR" ]; then
+    ln -sf /data/firefox "$FIREFOX_DIR"
+    log "Symlinked Firefox profile → /data/firefox"
+fi
+
+# ── XFCE config ───────────────────────────────────────────────
+mkdir -p /data/home/.config/xfce4
+if [ ! -L /data/home/.config/xfce4 ]; then
+    log "XFCE config dir ready at /data/home/.config/xfce4"
+fi
+
+# ── XDG runtime dir ───────────────────────────────────────────
+mkdir -p /tmp/runtime-ubuntu
+chown ubuntu:ubuntu /tmp/runtime-ubuntu
+chmod 700 /tmp/runtime-ubuntu
+
+# ── .bashrc / .profile ───────────────────────────────────────
+if [ ! -f /data/home/.bashrc ]; then
+    cat > /data/home/.bashrc << 'EOF'
+# Ubuntu PRoot-style environment on Hugging Face Space
+export HOME=/data/home
+export WORKSPACE=/data/workspace
+export PS1='\[\033[01;32m\]ubuntu@hf-space\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
+alias ll='ls -alF'
+alias la='ls -A'
+alias workspace='cd /data/workspace'
+echo "Welcome to your Ubuntu Desktop on Hugging Face Spaces!"
+echo "Workspace: /data/workspace  |  Home: /data/home"
+EOF
+    log "Created .bashrc"
+fi
+
+# ── Desktop shortcut: Workspace folder ────────────────────────
+DESKTOP_DIR=/data/home/Desktop
+cat > "$DESKTOP_DIR/workspace.desktop" << 'EOF'
+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=Workspace
+Comment=Open persistent workspace folder
+Exec=thunar /data/workspace
+Icon=folder-documents
+Terminal=false
+Categories=Utility;
+EOF
+chmod +x "$DESKTOP_DIR/workspace.desktop"
+
+# ── Desktop shortcut: Terminal ────────────────────────────────
+cat > "$DESKTOP_DIR/terminal.desktop" << 'EOF'
+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=Terminal
+Comment=Open XFCE Terminal
+Exec=xfce4-terminal
+Icon=utilities-terminal
+Terminal=false
+Categories=System;TerminalEmulator;
+EOF
+chmod +x "$DESKTOP_DIR/terminal.desktop"
+
+# ── Final ownership ───────────────────────────────────────────
+chown -R ubuntu:ubuntu /data/home
+
+log "Ubuntu user environment ready."

setup_vnc.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+# ============================================================
+# setup_vnc.sh – Configure Xvnc and XFCE xstartup
+# VNC state is stored in /data/vnc for persistence
+# ============================================================
+set -euo pipefail
+
+log() { echo "[VNC] $*"; }
+
+mkdir -p /data/vnc
+mkdir -p /data/home/.vnc
+
+# ── Symlink ~/.vnc → /data/vnc ────────────────────────────────
+VNC_LINK=/data/home/.vnc
+if [ -d "$VNC_LINK" ] && [ ! -L "$VNC_LINK" ]; then
+    cp -rn "$VNC_LINK/." /data/vnc/ 2>/dev/null || true
+    rm -rf "$VNC_LINK"
+fi
+if [ ! -L "$VNC_LINK" ]; then
+    ln -sf /data/vnc "$VNC_LINK"
+    log "Symlinked ~/.vnc → /data/vnc"
+fi
+
+# ── VNC password ──────────────────────────────────────────────
+if [ -n "${VNC_PASSWORD:-}" ]; then
+    echo "$VNC_PASSWORD" | vncpasswd -f > /data/vnc/passwd
+    chmod 600 /data/vnc/passwd
+    log "VNC password set"
+else
+    # No-auth mode (safe because Xvnc binds localhost only)
+    rm -f /data/vnc/passwd
+    log "VNC running in no-password mode (localhost-only, proxied via nginx)"
+fi
+
+# ── xstartup – launches XFCE session ─────────────────────────
+cat > /data/vnc/xstartup << 'XSTARTUP'
+#!/bin/bash
+# VNC xstartup – launched by Xvnc when a client connects
+
+unset SESSION_MANAGER
+unset DBUS_SESSION_BUS_ADDRESS
+
+export DISPLAY=:1
+export HOME=/data/home
+export USER=ubuntu
+export XDG_CONFIG_HOME=/data/home/.config
+export XDG_DATA_HOME=/data/home/.local/share
+export XDG_CACHE_HOME=/data/cache
+export XDG_RUNTIME_DIR=/tmp/runtime-ubuntu
+export LANG=en_US.UTF-8
+
+# Ensure runtime dir exists
+mkdir -p /tmp/runtime-ubuntu
+chmod 700 /tmp/runtime-ubuntu
+
+# Wallpaper / theme baseline (non-fatal)
+xsetroot -solid "#1a1a2e" 2>/dev/null || true
+
+# Start XFCE desktop session
+exec dbus-launch --exit-with-session startxfce4
+XSTARTUP
+chmod +x /data/vnc/xstartup
+
+# ── Xvnc log file ─────────────────────────────────────────────
+touch /data/logs/xvnc.log
+touch /data/logs/xfce4.log
+
+# ── Ownership ─────────────────────────────────────────────────
+chown -R ubuntu:ubuntu /data/vnc /data/home/.vnc 2>/dev/null || true
+
+log "VNC configuration ready."

start.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+# ============================================================
+# start.sh – Main container entrypoint
+# Initialises storage, user env, VNC, then hands off to supervisord
+# ============================================================
+set -euo pipefail
+
+# ── Colour helpers ───────────────────────────────────────────
+RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'
+BLUE='\033[0;34m'; NC='\033[0m'
+
+log()  { echo -e "${GREEN}[START]${NC} $*"; }
+warn() { echo -e "${YELLOW}[WARN ]${NC} $*"; }
+err()  { echo -e "${RED}[ERROR]${NC} $*" >&2; }
+
+# ── Banner ───────────────────────────────────────────────────
+echo ""
+echo -e "${BLUE}╔══════════════════════════════════════════════════╗${NC}"
+echo -e "${BLUE}║   Ubuntu 24.04 XFCE Desktop – HuggingFace Space ║${NC}"
+echo -e "${BLUE}║   PRoot-Distro Style  │  noVNC Browser Access   ║${NC}"
+echo -e "${BLUE}╚══════════════════════════════════════════════════╝${NC}"
+echo "  Started: $(date)"
+echo ""
+
+# ── Ensure /data exists (HF mounts it; fallback for local dev) ──
+if [ ! -d /data ]; then
+    warn "/data not found – creating in-container fallback (data will NOT persist)"
+    mkdir -p /data
+fi
+
+# ── Run setup phases ─────────────────────────────────────────
+log "Phase 1/3 – Persistent storage"
+bash /setup_storage.sh
+
+log "Phase 2/3 – Ubuntu user environment"
+bash /setup_ubuntu.sh
+
+log "Phase 3/3 – VNC configuration"
+bash /setup_vnc.sh
+
+# ── Ensure supervisor log dir ────────────────────────────────
+mkdir -p /data/logs
+mkdir -p /var/log/supervisor
+
+# ── Fix nginx tmp dirs ───────────────────────────────────────
+mkdir -p /var/lib/nginx/body /var/lib/nginx/proxy \
+         /var/lib/nginx/fastcgi /var/lib/nginx/uwsgi \
+         /var/lib/nginx/scgi
+chown -R www-data:www-data /var/lib/nginx
+
+# ── Hand off to supervisord ──────────────────────────────────
+log "Launching supervisord (manages all services)…"
+echo ""
+exec /usr/bin/supervisord -n -c /etc/supervisor/supervisord.conf

supervisord.conf

@@ -0,0 +1,132 @@
+[supervisord]
+nodaemon=true
+logfile=/data/logs/supervisord.log
+logfile_maxbytes=10MB
+logfile_backups=3
+loglevel=info
+pidfile=/var/run/supervisord.pid
+user=root
+childlogdir=/data/logs
+
+[unix_http_server]
+file=/var/run/supervisor.sock
+chmod=0700
+
+[rpcinterface:supervisor]
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
+
+[supervisorctl]
+serverurl=unix:///var/run/supervisor.sock
+
+; ── 1. Xvnc (virtual framebuffer + VNC server) ──────────────────────────────
+; Starts first (priority=100). Binds to localhost:5901 only.
+; SecurityTypes=None is safe because nginx/websockify front the connection.
+[program:xvnc]
+command=Xvnc :1
+    -geometry 1280x720
+    -depth 16
+    -rfbport 5901
+    -SecurityTypes None
+    -localhost
+    -nolisten tcp
+    -fp /usr/share/fonts/X11/misc/,built-ins
+priority=100
+user=ubuntu
+environment=HOME="/data/home",USER="ubuntu",XAUTHORITY="/data/vnc/.Xauthority",XDG_RUNTIME_DIR="/tmp/runtime-ubuntu"
+autostart=true
+autorestart=true
+startsecs=3
+startretries=10
+stopwaitsecs=10
+stdout_logfile=/data/logs/xvnc.log
+stderr_logfile=/data/logs/xvnc_err.log
+stdout_logfile_maxbytes=5MB
+stdout_logfile_backups=2
+
+; ── 2. XFCE4 desktop session ────────────────────────────────────────────────
+; Starts after Xvnc (priority=200). Wraps xstartup to handle restarts cleanly.
+[program:xfce4]
+command=/bin/bash -c "
+    sleep 2 &&
+    export DISPLAY=:1 &&
+    export HOME=/data/home &&
+    export USER=ubuntu &&
+    export XDG_CONFIG_HOME=/data/home/.config &&
+    export XDG_DATA_HOME=/data/home/.local/share &&
+    export XDG_CACHE_HOME=/data/cache &&
+    export XDG_RUNTIME_DIR=/tmp/runtime-ubuntu &&
+    exec dbus-launch --exit-with-session startxfce4
+"
+priority=200
+user=ubuntu
+environment=DISPLAY=":1",HOME="/data/home",USER="ubuntu",XDG_CONFIG_HOME="/data/home/.config",XDG_DATA_HOME="/data/home/.local/share",XDG_CACHE_HOME="/data/cache",XDG_RUNTIME_DIR="/tmp/runtime-ubuntu",LANG="en_US.UTF-8"
+autostart=true
+autorestart=true
+startsecs=5
+startretries=10
+stopwaitsecs=15
+stdout_logfile=/data/logs/xfce4.log
+stderr_logfile=/data/logs/xfce4_err.log
+stdout_logfile_maxbytes=5MB
+stdout_logfile_backups=2
+
+; ── 3. websockify (noVNC ↔ VNC bridge) ──────────────────────────────────────
+; Bridges WebSocket connections (from nginx/noVNC) to VNC on localhost:5901.
+[program:websockify]
+command=websockify
+    --web=/usr/share/novnc
+    --heartbeat=30
+    6080
+    localhost:5901
+priority=300
+user=ubuntu
+environment=HOME="/data/home"
+autostart=true
+autorestart=true
+startsecs=5
+startretries=10
+stopwaitsecs=10
+stdout_logfile=/data/logs/websockify.log
+stderr_logfile=/data/logs/websockify_err.log
+stdout_logfile_maxbytes=5MB
+stdout_logfile_backups=2
+
+; ── 4. Flask dashboard ───────────────────────────────────────────────────────
+[program:dashboard]
+command=python3 -u /app/app.py
+priority=400
+user=ubuntu
+environment=HOME="/data/home",USER="ubuntu",PYTHONUNBUFFERED="1"
+autostart=true
+autorestart=true
+startsecs=3
+startretries=5
+stopwaitsecs=10
+stdout_logfile=/data/logs/dashboard.log
+stderr_logfile=/data/logs/dashboard_err.log
+stdout_logfile_maxbytes=5MB
+stdout_logfile_backups=2
+
+; ── 5. nginx (public-facing reverse proxy on port 7860) ─────────────────────
+[program:nginx]
+command=nginx -g "daemon off;"
+priority=500
+user=root
+autostart=true
+autorestart=true
+startsecs=3
+startretries=5
+stopwaitsecs=10
+stdout_logfile=/data/logs/nginx.log
+stderr_logfile=/data/logs/nginx_err.log
+stdout_logfile_maxbytes=5MB
+stdout_logfile_backups=2
+
+; ── Event listener: restart crashed services ────────────────────────────────
+[eventlistener:crashmail]
+command=/bin/bash -c "
+    while read line; do
+        echo \"[CRASH] \$(date): \$line\" >> /data/logs/crashes.log
+    done
+"
+events=PROCESS_STATE_FATAL