[feature request] connect to multiple grpc services

This is a really good grpc frontend! I was planning to use it as a debugging/curl style hub for all our grpc backends. The problem I saw is that to support multiple backends, one has to run the command for each grpc service, and then expose it to different ports if the grpcui instances are deployed in one container.

Is it possible to connect to multiple grpc services with single exposed port and united UI? Is it possible for the UI to consolidate and support the selection for which service we want to talk to?

Thanks!