This container can be pulled via:
  docker pull registry.opensuse.org/devel/caasp/1.0/container/kubic/salt-minion:2018.3
  docker pull registry.opensuse.org/devel/caasp/1.0/container/kubic/salt-minion:2018.3.0
  docker pull registry.opensuse.org/devel/caasp/1.0/container/kubic/salt-minion:2018.3.0-17.22

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.