Mac code signing GRPC service
go run server.go -cert some.host.name.crt -key some.host.name.key -password MacKeychainPassword
go run client.go -cert some.host.name.crt -developer-id "Mac Developer ID" -address some.host.name:5001 -dmg path/to/some.dmg
go get -u github.com/square/certstrap
certstrap init --common-name "Some CA Name"
certstrap request-cert some.host.name
certstrap sign some.host.name --CA "Some CA Name"