config package from micro-strter-kit import myConfig "github.com/xmlking/grpc-starter-kit/internal/config" to `main.go` and all test files.

constants package is where you keep shared constants between packages Inspired by https://github.com/kubernetes/minikube/blob/master/pkg/minikube/constants/constants.go.

Singleton creational design pattern restricts the instantiation of a type to a single object.