feat: added grpcweb proxy that allows me to access grpc endpoints from the ui

[Peeeekay]

Using grpcWeb proxy to enable ui to access grpc endpoints; here is the https://github.com/improbable-eng/grpc-web

To expose both grpcWeb and grpc, I am using cmux here: https://github.com/soheilhy/cmux/tree/master

Changelog picked up from commits here:

feat: added grpcweb proxy that allows me to access grpc endpoints from the ui on the same port

[h4ck3rk3y]

have asked some questions. pending concerns

1. cmux hasn't had any updates since 2021 - is this still the right choice?
2. some possible race conditions that I am worried about
3. concerns about grpcweb not supporting a few of our features
4. can I get a notion explaining this architecture. why we are making this choice? how will it be working underneath? how does cmux play with grpcweb? The next dev we onboard and the rest of the team can use this.

[Peeeekay]

have asked some questions. pending concerns

1. cmux hasn't had any updates since 2021 - is this still the right choice?
2. some possible race conditions that I am worried about
3. concerns about grpcweb not supporting a few of our features
4. can I get a notion explaining this architecture. why we are making this choice? how will it be working underneath? how does cmux play with grpcweb? The next dev we onboard and the rest of the team can use this.

1.cmux for multiplexes seems like the best choice at least for serving requests on same port; this is not long term imo. I have seen it being used by other repos like opentracing etc.. so don't think it should be a huge issue.

2. let me check the race condition query you had - will get back on that.

3.grpcweb not supporting features like bi-di and client is fine for now; as in near term that is not needed and by then we should invest time on supporting connect.

4. Sure; though I don't think this is long term solution -- this can be seen as stopgap solution.

[h4ck3rk3y]

Is it okay for the frontend to not support upload files / upload StarlarkPackage?

[Peeeekay]

Is it okay for the frontend to not support upload files / upload StarlarkPackage?

yeah - i don;t think we are supporting that behaviour in short term for frontend.