This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/etcd:3.6.5
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/etcd:3.6.5-0
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/etcd:3.6.5-0.6.488
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/etcd:3.6.5-1
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/etcd:3.6.5-1.6.488

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.