This package that makes it easy to enable configuration of an app in one line of code. All you need is to declare the struct that will hold values of your config and call Read method https://github.com/num30/config . Then you can configure an app using ENV vars, File, or command line arg. This project was born inside my current company where we have plenty of micro services that we want to be configured in different ways whether they run in K8s cluster or locally. I'd love to hear your feedback!