Connect lib-jitsi-meet to custom videobridge

Hello,
I installed jitsi videobridge on my VM using docker-jitsi-meet.
Now, if I want to connect to it using jitsi-meet I can simply do it using
export WEBPACK_DEV_SERVER_PROXY_TARGET=10.20.30.40.

What about if I want to use my videobridge directly from the lower level library lib-jitsi-meet?
In particular, what should I put in the fields to for the initialization (JitsiMeetJS.JitsiConnection(…))?
Like in here (https://github.com/jitsi/lib-jitsi-meet/blob/master/doc/example/example.js):
const options = { hosts: { domain: 'jitsi-meet.example.com', muc: 'conference.jitsi-meet.example.com' }, bosh: '//jitsi-meet.example.com/http-bind', clientNode: 'http://jitsi.org/jitsimeet' };
I also see someone using something like serviceUrl: wss://${serverURL}/xmpp-websocket?room=test but I didn’t find any specific documentation.

Thanks in advance