HelloWorld proto example

Generate Go code:

go install google.golang.org/grpc/cmd/protoc-gen-go-grpc

protoc \
--go_out=Mgrpc/service_config/service_config.proto=/internal/proto/grpc_service_config:. \
--go-grpc_out=Mgrpc/service_config/service_config.proto=/internal/proto/grpc_service_config:. \
--go_opt=paths=source_relative \
--go-grpc_opt=paths=source_relative \
helloworld.proto