gRPC helloworld demo code in golang, python and node.js

Idea

Here is the GitHub repo for the demo code

https://github.com/chianingwang/grpc-helloworld

Reference:

https://grpc.io/
https://github.com/chianingwang/grpc-helloworld
https://dev.to/plutov/benchmarking-grpc-and-rest-in-go-565
https://auth0.com/blog/beating-json-performance-with-protobuf/