jiti-meet/doc/example-config-files/multidomain/config.js.multidomain.example

var subdomain = "<!--# echo var="subdomain" default="" -->";
if (subdomain) {
    subdomain = subdomain.substr(0,subdomain.length-1).split('.').join('_').toLowerCase() + '.';
}

var config = {
    hosts: {
        domain: 'jitsi.example.com',
        muc: 'conference.'+subdomain+'jitsi.example.com', // FIXME: use XEP-0030
        focus: 'focus.jitsi.example.com',
    },
    useNicks: false,
    bosh: '//jitsi.example.com/http-bind', // FIXME: use xep-0156 for that
    websocket: 'wss://jitsi.example.com/xmpp-websocket'
};