Dockerfile

# Multi-stage build for production deployment

# Stage 1: Build frontend
FROM node:18-alpine AS frontend-builder

WORKDIR /app/frontend

# Copy package files
COPY frontend/package*.json ./

# Install dependencies
RUN npm ci

# Copy frontend source
COPY frontend/ ./

# Build frontend
RUN npm run build

# Stage 2: Python backend
FROM python:3.11-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    && rm -rf /var/lib/apt/lists/*

# Copy backend requirements
COPY backend/requirements.txt ./

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend code
COPY backend/ ./backend/

# Copy built frontend from builder stage
COPY --from=frontend-builder /app/frontend/dist ./frontend/dist

# Create directory for progress file
RUN mkdir -p /app/data

# Set environment variables
ENV FLASK_APP=backend/app.py
ENV FLASK_ENV=production
ENV PORT=5000

# Expose port
EXPOSE 5000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD python -c "import requests; requests.get('http://localhost:5000/api/health')" || exit 1

# Run with gunicorn
CMD ["gunicorn", "backend.app:app", "--bind", "0.0.0.0:5000", "--workers", "2", "--timeout", "120"]