After: auth moved to its own host

The main site and auth site still run in one Python process.

But Starlette chooses between two FastHTML apps by host.

• https://after.fooglie.com/
• https://auth.after.fooglie.com/
• https://auth.after.fooglie.com/bla

Open auth home

Open auth /bla

Request host: after.fooglie.com