Rewrite server.js to use google-auth-library for generating Google ID
tokens when authenticating requests to the backend Cloud Run service.
Key changes:
- Replace metadata server token fetch with GoogleAuth client
- Implement proper SSE streaming with raw byte passthrough
- Add health check endpoint for Cloud Run monitoring
- Update server to listen on 0.0.0.0:8080 for Cloud Run compatibility
- Add environment variable validation at startup
- Improve error handling and logging throughout request lifecycle
Update Dockerfile to install google-auth-library dependency and expose
port 8080 instead of port 80.
Replace Python http.server with Express to handle:
- Large IAP JWT headers that caused 500 errors
- API request proxying with GCP identity tokens
- Static React build serving with SPA fallback
Update api.ts to use relative URLs in production for proxy routing.
Danny