Add new infra architecture 6

gateway/Dockerfile

@@ -1,10 +1,28 @@
-# Add this stage at the top of each service Dockerfile
-FROM localhost:5000/python_3.11-slim AS shared
+# =============================================================================
+# 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/
 
-# Then your main service stage
-FROM localhost:5000/python_3.11-slim
+# 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