This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/arm/totest/containers/kubic/coredns:1.8.4
  docker pull registry.opensuse.org/opensuse/factory/arm/totest/containers/kubic/coredns:1.8.4-3.30

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.