Implement real, working microservices architecture

backend/services/gateway/Dockerfile

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+# Gateway Service Dockerfile
+FROM backend/base:latest
+
+# Copy service-specific files
+COPY backend/app.py /app/backend/app.py
+COPY backend/main.py /app/backend/main.py
+COPY backend/dependencies.py /app/backend/dependencies.py
+COPY backend/security /app/backend/security/
+COPY backend/services/gateway/main.py /app/backend/services/gateway/main.py
+
+# Set service name for entrypoint
+ENV SERVICE_NAME=gateway
+
+EXPOSE 8301

backend/services/gateway/main.py

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+from fastapi import FastAPI
+
+# Gateway service - handles complex operations that Caddy cannot
+# This will be expanded later with routing logic to other services
+
+if __name__ == "__main__":
+    app = FastAPI(title="Gateway Service")
+
+    import os, uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 8301)))