Hello, I'm using nodeBB to host a forum on https://www.heigoule.com, I really like nodebb for its simplicity and extensibility.

My site met a bug
WebSocket connection to 'wss://www.heigoule.com/socket.io/?EIO=3&transport=websocket&sid=ziovHZJFdHWmdYmkAAAD' failed: Error during WebSocket handshake: Unexpected response code: 400
Then I found that it was caused by my CDN service, they won't support websocket. The site worked perfectly before using cdn, so it's not a problem of my nginx configuration.

The question is what should I do to make nodebb use another subdomain for websocket which I will disable websocket for?

Thanks for your help!