Dockerfile

# Production Dockerfile
# Optimized for production with security and performance
FROM python:3.11-slim AS builder

# Install build dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    postgresql-client \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /app

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

# Production stage
FROM python:3.11-slim

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    postgresql-client \
    && rm -rf /var/lib/apt/lists/* \
    && apt-get clean

# Create non-root user
RUN adduser --disabled-password --gecos '' --uid 1000 appuser

# Set working directory
WORKDIR /app

# Copy Python dependencies from builder stage
COPY --from=builder /root/.local /home/appuser/.local

# Make sure scripts in .local are usable
ENV PATH=/home/appuser/.local/bin:$PATH

# Copy application code
COPY --chown=appuser:appuser . .

# Make startup script executable
RUN chmod +x /app/start-prod.sh

# Switch to non-root user
USER appuser

# Set production environment variables
ENV FLASK_ENV=production
ENV FLASK_DEBUG=0
ENV PYTHONPATH=/app
ENV PYTHONUNBUFFERED=1

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD curl -f http://localhost:8000/health || exit 1

# Run the application with startup script
CMD ["/app/start-prod.sh"]