feat:#36 added protobuf for golang microservices

services/Makefile

@@ -0,0 +1,16 @@
+run-data-manager:
+	@go run data-manager/main.go serve
+
+run-ical:
+	@go run ical/main.go
+
+build-ical:
+	@go build ical/main.go
+
+gen:
+	@protoc \
+	  --proto_path=protobuf "protobuf/modules.proto" \
+	  --go_out=common/genproto/modules \
+	  --go_opt=paths=source_relative \
+	  --go-grpc_out=common/genproto/modules \
+	  --go-grpc_opt=paths=source_relative