Updated app.py

app.py

@@ -11,12 +11,13 @@ from scipy.ndimage import gaussian_filter1d
 from datetime import timedelta, datetime
  
 gcp_credentials = os.getenv('GCP_CREDENTIALS')
-credentials_dict = json.loads(gcp_credentials)
 
+if not gcp_credentials:
+    raise ValueError("GCP_CREDENTIALS environment variable is not set.")
+    
+credentials_dict = json.loads(gcp_credentials)
 creds = service_account.Credentials.from_service_account_info(credentials_dict)
-
 client = storage.Client(credentials=creds)
-
 bucket_name = "kapnotes"
 bucket = client.bucket(bucket_name)