Hey @dnrtc, welcome to the Glitch forum!
The hello-webpage project relies on the lws package for its web server and supports the configuration explained in https://github.com/lwsjs/local-web-server/wiki. If you look at the files in /opt/watcher/app-types/static/ you can see how we start up the web server.
Hope this helps, and if not let me know what else you’d like to know.