One operator account and one site, and you are running. This page disappears as soon as it is done.
This becomes the platform operator — the only role that can create sites and attach domains.
At least 10 characters.
You can create more, each on its own domain, from the console afterwards.
The address you are on now. Its DNS should point at 88.99.55.87.
Prefer the command line? npm run bootstrap does the same thing without a browser.
npm run bootstrap