chore: hardcode GOOGLE_CLIENT_ID for production

backend/config.py

@@ -45,4 +45,4 @@ EFI_ENU_CODE = os.getenv("EFI_ENU_CODE", "xx123yy456")
 EFI_BUS_UNIT = os.getenv("EFI_BUS_UNIT", "br123")      
 EFI_OPERATOR = os.getenv("EFI_OPERATOR", "op123")      
 EFI_STAGING = os.getenv("EFI_STAGING", "True").lower() == "true"
-GOOGLE_CLIENT_ID = os.getenv("GOOGLE_CLIENT_ID", "")
+GOOGLE_CLIENT_ID = os.getenv("GOOGLE_CLIENT_ID", "254513580225-j893ad8nd2f2celd2thn1l42miqm9e7s.apps.googleusercontent.com")