Update app.py

app.py

@@ -11,7 +11,7 @@ install_package()
 # Define a function to serve the game
 def serve_game():
     # Read the index.html file from the cloned repository
-    with open("index.html", "r") as file:
+    with open("mario/index.html", "r") as file:
         html_content = file.read()
     return html_content