Add root route for HF app page

main.py

@@ -99,6 +99,10 @@ app = Flask(__name__)
 # Enable CORS for cross-origin requests from the app
 CORS(app)
 
+@app.route('/', methods=['GET'])
+def root():
+    return jsonify({"message": "GatePass backend running"}), 200
+
 @app.route('/health', methods=['GET'])
 def health_check():
     return jsonify({"status": "ok"}), 200