Update app.py

app.py

@@ -10,6 +10,11 @@ def index():
 def league():
     return send_from_directory('.', 'league.html')
 
+@app.route('/league.html')
+def league_html():
+    # Alias to support environments that request the .html path explicitly
+    return send_from_directory('.', 'league.html')
+
 @app.route('/<path:path>')
 def static_proxy(path):
     # Serve static files (images, js, css) if referenced