This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/kubic/etcd:3.6.8
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/kubic/etcd:3.6.8-0
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/kubic/etcd:3.6.8-0.5.236
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/kubic/etcd:3.6.8-1
  docker pull registry.opensuse.org/opensuse/factory/zsystems/totest/containers/kubic/etcd:3.6.8-1.5.236

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.