Update app.py

app.py

@@ -120,4 +120,5 @@ def key_info():
     return Response(json.dumps(key_manager.get_key_info()), mimetype='application/json')
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0', port=int(os.environ.get('PORT', 7860)))
+    port = int(os.environ.get('PORT', 7860))
+    app.run(host='0.0.0.0', port=port)