Dockerfile.spaces

# HuggingFace Spaces — single container (backend + frontend)
# Port 7860 (Spaces default)

# --- Stage 1: Build frontend ---
FROM node:22-alpine AS frontend-build
WORKDIR /app
RUN corepack enable
COPY frontend/package.json frontend/pnpm-lock.yaml ./
RUN pnpm install --frozen-lockfile
COPY frontend/ .
RUN pnpm build

# --- Stage 2: Runtime ---
FROM python:3.11-slim

WORKDIR /app

# Install nginx + supervisor
RUN apt-get update && apt-get install -y --no-install-recommends nginx supervisor \
    && rm -rf /var/lib/apt/lists/*

# Install uv
COPY --from=ghcr.io/astral-sh/uv:latest /uv /bin/uv

# Install Python dependencies
COPY backend/pyproject.toml backend/uv.lock ./
RUN uv sync --frozen --no-dev

# Copy backend code
COPY backend/neural_mri/ neural_mri/

# Copy frontend build
COPY --from=frontend-build /app/dist /usr/share/nginx/html

# Nginx config: serve frontend + proxy API/WS to backend
RUN cat > /etc/nginx/conf.d/default.conf <<'NGINX'
server {
    listen 7860;
    root /usr/share/nginx/html;
    index index.html;
    client_max_body_size 10M;

    location / {
        try_files $uri $uri/ /index.html;
    }
    location /api/ {
        proxy_pass http://127.0.0.1:8000;
        proxy_read_timeout 300;
    }
    location /ws/ {
        proxy_pass http://127.0.0.1:8000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_read_timeout 300;
    }
}
NGINX
# Remove default site
RUN rm -f /etc/nginx/sites-enabled/default

# Supervisor config: run nginx + uvicorn together
RUN cat > /etc/supervisor/conf.d/app.conf <<'SUPER'
[supervisord]
nodaemon=true
logfile=/dev/stdout
logfile_maxbytes=0

[program:backend]
command=uv run uvicorn neural_mri.main:app --host 127.0.0.1 --port 8000
directory=/app
autostart=true
autorestart=true
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0

[program:nginx]
command=nginx -g "daemon off;"
autostart=true
autorestart=true
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
SUPER

# Pre-download GPT-2 to avoid first-load delay
RUN uv run python -c "from transformers import AutoTokenizer, AutoModelForCausalLM; AutoTokenizer.from_pretrained('gpt2'); AutoModelForCausalLM.from_pretrained('gpt2')"

ENV NMRI_DEVICE=cpu
ENV NMRI_DEFAULT_MODEL=gpt2
ENV NMRI_ENVIRONMENT=huggingface
ENV NMRI_CORS_ORIGINS='["*"]'

EXPOSE 7860

CMD ["supervisord", "-c", "/etc/supervisor/supervisord.conf"]