$ mkdir ~/.ggn
$ cd ~/.ggn
$ touch config.json

{
  "host":     "https://git.hogehoge.com",
  "api_path": "/api/v3",
  "token":    "aaaaaaaaaaaaaaaaaaaaaa"
}

$ cd ~/.ggn
$ curl -O https://github.com/kyokomi/go-gitlab-notifer/raw/master/build/logo.png

$ brew install terminal-notifier

$ go-gitlab-notifer help