example.go

var (
	// Tag is set by Gitlab's CI build process
	Tag string
	// Build is set by Gitlab's CI build process
	Build string
)

router.HandleFunc("/ping", func(w http.ResponseWriter, req *http.Request) {
	w.Header().Set("Content-type", "application/json")
	w.WriteHeader(200)
	json.NewEncoder(w).Encode(struct {
		Tag   string
		Build string
	}{Tag, Build})
})