Update app.py

app.py

@@ -11,6 +11,9 @@ app.secret_key = "supersecretkey"  # change in production
 # -------- Supabase setup --------
 SUPABASE_URL = os.environ.get("SUPABASE_URL")
 SUPABASE_KEY = os.environ.get("SUPABASE_KEY")
+if not SUPABASE_URL or not SUPABASE_KEY:
+    raise ValueError("Supabase URL or KEY not set in environment variables")
+
 supabase = create_client(SUPABASE_URL, SUPABASE_KEY)
 
 # -------- Load ML model --------