https config to test in VR with the ip

[Vincent Fretin]

navigator.mediaDevices is undefined on non secure context. Secure context is https or localhost 127.0.0.1.
You'll get the following error if you use your ip 192.168.1.15 for example and connect to test multi-users:

networked-aframe.min.js:1 TypeError: Cannot read properties of undefined (reading 'getUserMedia')
    at h.value (networked-aframe.min.js:1:32361)
    at networked-aframe.min.js:1:27572
    at new Promise (<anonymous>)
    at h.value (networked-aframe.min.js:1:27543)
    at t.value (networked-aframe.min.js:1:10214)
    at n.connect (networked-aframe.min.js:1:74489)
    at v.emit (a-node.js:293:10)
    at HTMLButtonElement.onclick (index.html:222:36) 'failure to connect

Add a commented config to run on https or maybe enable it via an environment variable and use a specific command npm run start:https
See networked-aframe/naf-valid-avatars@a4479b6 where I actually use the self-signed certificate generated by webpack dev server.