This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/etcd:3.5.24-0.6.408
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/etcd:3.5.24-1.6.408

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.