Gave up using WebSocket

Flask-SocketIO does not fully compatible with Gunicorn, and it limited to 1 worker, which it will takes forever to finish loading the webpage. Switched back to  using ajax.

src/gunicorn.conf.py

@@ -4,8 +4,7 @@ import dashboard
 app_host, app_port = dashboard.get_host_bind()
 
 worker_class = 'gthread'
-# workers = multiprocessing.cpu_count() * 2 + 1
-workers = 1
+workers = multiprocessing.cpu_count() * 2 + 1
 threads = 4
 bind = f"{app_host}:{app_port}"
 daemon = True