Dockerfile

# Multi-stage build for Redis Python test app
FROM python:3.11-slim as builder

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

# Set working directory
WORKDIR /app

# Copy requirements and install 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 \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Create non-root user
RUN useradd --create-home --shell /bin/bash app

# Set working directory
WORKDIR /app

# Copy installed packages from builder
COPY --from=builder /root/.local /home/app/.local

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

# Make sure scripts are executable
RUN chmod +x /app/*.py

# Switch to non-root user
USER app

# Add local packages to PATH
ENV PATH=/home/app/.local/bin:$PATH

# Expose metrics port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8000/metrics || exit 1

# Default command
CMD ["python", "main.py", "--help"]