How to put volumio on the internet

[oniyakun]

I try to use ngrok to put volumio on the internet like example.ngrok.com. But volumio always post the request to local area network address like 192.168.31.222/socket.io/xxxxxxxx, it should be post to example.ngrok.com/socket.io/xxxxxx ! I try to fix it but I can't find the config file. What should I do?