bakery-ia/gateway/Dockerfile

# =============================================================================
# Gateway Dockerfile - Environment-Configurable Base Images
# =============================================================================
# Build arguments for registry configuration:
#   - BASE_REGISTRY: Registry URL (default: docker.io for Docker Hub)
#   - PYTHON_IMAGE: Python image name and tag (default: python:3.11-slim)
#
# Usage:
#   Dev:  docker build --build-arg BASE_REGISTRY=localhost:5000 --build-arg PYTHON_IMAGE=python_3.11-slim .
#   Prod: docker build --build-arg BASE_REGISTRY=ghcr.io/your-org --build-arg PYTHON_IMAGE=python:3.11-slim .
# =============================================================================

# Build arguments - can be overridden at build time
ARG BASE_REGISTRY=docker.io
ARG PYTHON_IMAGE=python:3.11-slim

# Stage 1: Copy shared libraries
FROM ${BASE_REGISTRY}/${PYTHON_IMAGE} AS shared
WORKDIR /shared
COPY shared/ /shared/

# Stage 2: Main service
ARG BASE_REGISTRY=docker.io
ARG PYTHON_IMAGE=python:3.11-slim
FROM ${BASE_REGISTRY}/${PYTHON_IMAGE}

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

WORKDIR /app

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

# Copy requirements
COPY gateway/requirements.txt .

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

# Copy shared libraries from the shared stage
COPY --from=shared /shared /app/shared

# Copy application code
COPY gateway/ .

# Change ownership to non-root user
RUN chown -R appuser:appgroup /app

# Add shared libraries to Python path
ENV PYTHONPATH="/app:/app/shared:${PYTHONPATH:-}"

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 8000

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

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