Enforce local building of code--for now.
Prevent accidently over sharing credentials.

This provides for bootstrapping a hosting directory
with a minimal discovery HTML document.

It is copied on the first run of the server, but not
on subsequent runs to avoid overwriting changes.

Re-bootstrapping simply requires moving the `index.html`
from the `rootPath` directory.

rootPath is now...root. Other paths are all expected to
be served from inside of rootPath (relatively).

Avoids double // issues