Dockerfile

# Multi-stage build for production
# Stage 1: Builder
FROM python:3.11-slim as builder

WORKDIR /app

# Install system dependencies needed for building Python packages
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    postgresql-client \
    && rm -rf /var/lib/apt/lists/*

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

# Stage 2: Runtime (smaller final image)
FROM python:3.11-slim

# Create non-root user for security
RUN groupadd -r appuser && useradd -r -g appuser appuser

WORKDIR /app

# Install only runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    libpq5 \
    curl \
    && rm -rf /var/lib/apt/lists/*

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

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

# Set environment variables
ENV PATH=/home/appuser/.local/bin:$PATH \
    PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1

# Switch to non-root user
USER appuser

# 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
CMD ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "8000"]