These perhaps?:
https://github.com/SergioBenitez/Rocket
https://github.com/actix/actix-web
https://github.com/carllerche/tower-web
Not saying that is the primary use, but still a valid question as long as these libraries are being built/pushed.
I think things are much more viable for "services" rather than "sites" right now. And the npm thing is a service.