[Feat]: please add support to expose grpc:// uris (http2)

## What is your suggestion?
please add support to expose grpc:// uris (http2) -via proxy or any other way

## Why do you want this feature?
to enable development with grpc-web

## Are there any workarounds to get this functionality today?
No (?)

## Are you interested in submitting a PR for this?
I wouldn't know where to start