Zarf docker domain matcher
Used by Zarf to swap the registry domain/port part an image url without needed the docker libraries.  usage in go:
func SwapHost(src string, targetHost string) string {
	var parser = regexp.MustCompile((?im)^([a-z0-9\-.]+\.[a-z0-9\-]+:?[0-9]*)?/?(.+)$)
	var substitution = targetHost + "/$2"
	return...
Submitted by Jeff McCoy - 4 years ago