Dockerfile

# Base Image (LTS version for maximum stability)
FROM ubuntu:22.04

# Environment Variables
ENV DEBIAN_FRONTEND=noninteractive
ENV LANG=C.UTF-8 LC_ALL=C.UTF-8

# Install Core Professional Tools + Network Diagnostic Tools (net-tools, iproute2, lsof)
RUN apt-get update && apt-get install -y --no-install-recommends \
    curl wget git htop nano vim python3 python3-pip sudo zsh tmux unzip locales \
    net-tools iproute2 lsof procps \
    && apt-get clean && rm -rf /var/lib/apt/lists/*

# Web Terminal (ttyd) Setup - Silent and secure download
RUN wget -q https://github.com/tsl0922/ttyd/releases/download/1.7.3/ttyd.x86_64 -O /usr/local/bin/ttyd \
    && chmod +x /usr/local/bin/ttyd

# Create User and Setup Sudo safely
RUN useradd -m -s /bin/zsh -u 1000 user \
    && echo "user ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

USER user
ENV HOME=/home/user
ENV PATH="/home/user/.local/bin:${PATH}"
WORKDIR $HOME/app

# ULTRA-FAST ZSH SETUP (No Oh-My-Zsh, zero lag, instant response)
RUN echo "autoload -U colors && colors" > ~/.zshrc \
    && echo "PROMPT=$'\n%{$fg[cyan]%}%~%{$reset_color%}\n%{$fg[green]%}❯%{$reset_color%} '" >> ~/.zshrc \
    && echo "alias ll='ls -alF'" >> ~/.zshrc \
    && echo "alias la='ls -A'" >> ~/.zshrc \
    && echo "alias l='ls -CF'" >> ~/.zshrc \
    && echo "clear" >> ~/.zshrc

# ZERO-LATENCY TMUX CONFIG (Mouse OFF for native text selection)
RUN echo 'set -g default-terminal "screen-256color"' > ~/.tmux.conf \
    && echo 'set -g mouse off' >> ~/.tmux.conf \
    && echo 'set -s escape-time 0' >> ~/.tmux.conf \
    && echo 'set -g history-limit 100000' >> ~/.tmux.conf \
    && echo 'set -g status-bg "#000000"' >> ~/.tmux.conf \
    && echo 'set -g status-fg "#ffffff"' >> ~/.tmux.conf \
    && echo 'set -g status-left-length 50' >> ~/.tmux.conf \
    && echo 'set -g status-left "#[fg=#ffffff,bg=#222222,bold] WORKSPACE [#S] #[bg=#000000] "' >> ~/.tmux.conf \
    && echo 'set -g status-right "#[fg=#888888]%Y-%m-%d #[fg=#ffffff]%H:%M "' >> ~/.tmux.conf \
    && echo 'set -g pane-border-style fg="#333333"' >> ~/.tmux.conf \
    && echo 'set -g pane-active-border-style fg="#555555",bg=default' >> ~/.tmux.conf

# 🚀 OPTIMIZATION: Copy requirements first to leverage Docker Layer Caching
COPY --chown=user:user requirements.txt $HOME/app/

# Safely install Python Requirements
RUN if grep -q '^[^#[:space:]]' requirements.txt; then \
        pip3 install --no-cache-dir --upgrade pip && \
        pip3 install --no-cache-dir -r requirements.txt; \
    else \
        echo "No active python packages found to install."; \
    fi

# Copy the rest of the project files
COPY --chown=user:user . $HOME/app

# Port for ttyd or FastAPI
EXPOSE 7860

# Default execution command
CMD ["python3", "app.py"]