So (finally) got it running, but the page doesn't load due to this error in Chrome :

auth0-spa-js must run on a secure origin

Which of course is completely ok because not running on localhost but rather on an ubuntu image and connect to

<http://192.168.88.133:8080>

in chrome address bar

<chrome://flags/#unsafely-treat-insecure-origin-as-secure>

added this domain. No luck, next error :

Refused to frame '<https://login.prefect.io/>' because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'none'".

Anyone solved or run it on a different machine? Alternatively I end up running SSH and tunnel to it... Putty, ssh tunnel forward 8080 and 4200, and all is good. Maybe a nice addendum to the documentation.