Hi @Nam-Vu, some example working configurations can be found here https://docs.nodebb.org/configuring/proxies/nginx/
If your config is not working, please paste it here for us to review. Thanks!
But I get error each time refresh (F5).
Browser console output :
WebSocket connection to 'ws://126.96.36.199/socket.io/?EIO=3&transport=websocket&sid=272_fqLIM0WJupWXAAA1' failed: Error during WebSocket handshake: Unexpected response code: 400