This is pretty awesome. I was going to ask if it is constrained by any Same Origin restrictions, but I see the note at the bottom of the page that you must "enable CORS" on the localhost server, so indeed it is constrained by such policies. Specifically, I imagine the requirement is that the server you're tunneling to respond with `Access-Control-Allow-Origin: app.tabserve.dev`.

Is this correct? Or should the value be the subdomain of the cloudflare worker? In other words, which is the "origin" of the proxied requests? I assume it's `app.tabserve.dev` since the user is accessing the tunneled service through the worker subdomain which would be the value of the `Host` header.