This is a static page served from ./mount-origin/index.html.
Stuff down /secret in the URL space is protected by Basic Auth.
Your browser will ask for a username / password combination, and
lws will check it against ./ba-passwords, which contains a list of
"username:password" one per line.
The example content for ba-passwords is literally "user:password".
Click on the link into the protected area of the URL space below
and give your browser the credentials "user" and "password".