auth-backend

Simple Node backend that proxies Firebase Authentication to issue custom tokens.

Setup

1. Copy .env.example to .env and fill in your Firebase project values:
   • FIREBASE_PROJECT_ID
   • FIREBASE_CLIENT_EMAIL
   • FIREBASE_PRIVATE_KEY (remember to keep escaped new lines \n inside quotes)
   • FIREBASE_WEB_API_KEY
   • optional PORT
2. Run npm start to boot the HTTP server (defaults to port 4000).

API

• POST /api/auth/register – body { email, password, displayName? }.
  • creates the Firebase user via the Identity Toolkit API.
  • returns { uid, customToken }.
• POST /api/auth/login – body { email, password }.
  • verifies the Firebase credentials via the Identity Toolkit API.
  • returns { uid, customToken }.
• GET /health – basic readiness probe.

Responses include a Firebase custom token generated with your service account credentials.