Update app.py

app.py

@@ -21,6 +21,8 @@ from google.cloud import storage
 
 # Update the path below to your Firebase service account key JSON file
 SERVICE_ACCOUNT_KEY = "serviceAccountKey.json"  # <-- Ensure this file exists in your project directory
+if not os.path.exists(SERVICE_ACCOUNT_KEY):
+    raise FileNotFoundError(f"Firebase credentials file {SERVICE_ACCOUNT_KEY} not found!")
 
 # Initialize Firebase Admin for Realtime Database
 cred = credentials.Certificate(SERVICE_ACCOUNT_KEY)