You can development this app using creasty/rid.
$ rid bootstrap
$ rid pg start
$ rid pg createdb grpc-and-gateway-sample-app-go
TBD
$ rid server
$ curl --request GET \
--url http://localhost:3100/api/profiles/1
$ rid make test
$ rid make setup
$ rid dep -v -no-vendor
$ rid dep -v -add <pkg>
$ rid swagger start
$ open http://localhost:8080