Let's please not upvote this. It is _not_ a "standard" go project - it doesn't even have a go.mod. Furthermore, it is in an org called "golang standards", when in reality it and its projects are not standards - they're just some opinions of some programmers.
Let's please not make getting started with golang more confusing to beginners by falsely claiming standards.
Also, see numerous similar complaints in this project's issue tracker: [ex1 https://github.com/golang-standards/project-layout/issues/38) [ex2 https://github.com/golang-standards/project-layout/issues/38].