To get started, log in to your domain control panel, create a new subdomain, and point it at a triweb relay server by creating a CNAME record like:
app.mydomain.com CNAME triweb.io.
Select the application that you want by adding a DNS TXT record,
Still in the domain control panel, create TXT records for the _triweb. subdomain that specify the URL of a manifest file for the triweb application (TWA) that you want to install and any optional runtime arguments, e.g.: