Install with the Deploy to Cloudflare button in the project README: keep the names it suggests and press Deploy. Nothing technical is asked.
Open your address and press Create my login (for your safety, it has to be within a day of installing and an hour of first opening that page). Your email and a password appear once, with copy buttons: save them in your password manager, or choose your own password there. Then the setup asks for an AI key, the search data key (optional) and your first project. It runs once.
Change your email and password in My profile, in the account menu, where you also sign out. Keys change in Admin > Providers. Prefer a terminal? Run the installer from your checkout; the first visit creates your login the same way.
npm ci
npm run setup