start grpc server
go run cmd/grpc/server/main.go
> grpc listen 127.0.0.1:10000
start http server
go run cmd/http/main.go
> http listen 127.0.0.1:10001
start grpc client
go run cmd/grpc/client/main.go
> value:"hi bitebit"
start http client
curl -X POST http://127.0.0.1:10001/v1/example/echo --data '{"value": "bitebit"}'
> {"value":"hi bitebit"}