> compile

$ exists target/scala-2.12/pekko-grpc/main
$ exists target/scala-2.12/pekko-grpc/main/example/myapp/helloworld/grpc/HelloRequest.scala
$ exists target/scala-2.12/pekko-grpc/main/example/myapp/helloworld/grpc/HelloworldProto.scala
$ exists target/scala-2.12/pekko-grpc/main/example/myapp/helloworld/grpc/GreeterService.scala
