This container can be pulled via:
  docker pull registry.opensuse.org/home/kukuk/container/workday-counter:2.1.1
  docker pull registry.opensuse.org/home/kukuk/container/workday-counter:2.1.1-2.79
  docker pull registry.opensuse.org/home/kukuk/container/workday-counter:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.