kanban-app/backend/Dockerfile

FROM python:3.11-slim

WORKDIR /app

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

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

# Copy application code
COPY . .

# Create non-root user
RUN useradd -m appuser && chown -R appuser:appuser /app
USER appuser

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8000/health/ || exit 1

# Run with gunicorn
CMD ["gunicorn", "--bind", "0.0.0.0:8000", "--workers", "4", "wsgi:app"]