This repository accommodates all the protobufs for all services. You probably need to include it and tag a version of it (#TODO) in your project.
Naming is important, each directory should be named with the exact NAME_ID of the serivce it holds. This eas readability and code generation, for example, when gurantee all the names are corresponding for their services, a Makefile can be used to generate protc files:
#!/usr/bin/env sh
result=${PWD##*/}
protoc --go_out=. --go_opt=paths=import \
--go-grpc_out=. --go-grpc_opt=paths=import \
protobufs/$result/*