Use lib-jitsi-meet and NodeJs

Hello,
I’im trying to create a web interface with lib-jitsi-meet and NodeJs.
The lib-jitsi-meet side work when it’s hosted on Nginx but if I put files in my NodeJs system, it returns error “Strophe: request id 1.1 error 404 happened” in the browser console.

My lib-jitsi-options :
connection = new JitsiMeetJS.JitsiConnection(null, null, {
hosts: {
domain: ‘localhost’,
muc: ‘conference.localhost’
}
})

(and the nodeJs server listens localhost port 4443)