Self-hosting
This page is still being written.
It will cover running the relay, its certificate authority and the admin console in your own account, and pointing the connector at them with relay.endpoint. Everything the hosted service runs is a small number of components with no shared state between them, so self-hosting is a matter of configuration rather than a different product.
Until then, the security model describes what each component holds, and the connector configuration shows the one value that changes when you self-host.