Change port for websocket

[VictorBac]

Hi everyone.

I am trying to run the dev vite server behind a reverse proxy (nginx) for SSL terminaison.

I redirect https://mysite.com to http://localhost:3000

Everything works fine, except that a websocket is trying to connect directly to https://mysite.com:3000.
I'd like it to connect to another port (let's say 3005), then nginx will redirect it to localhost:3000
(Why is there even a websocket ?)

Is there a way to configure the server to "advertize" port 3005, while listening to port 3000 ? So I can redirect it with nginx ?

(When the websocket fail, the page is reload..)

Thank you!