This container can be pulled via:
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/kube-apiserver:latest
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/kube-apiserver:v1.31.0
  docker pull registry.opensuse.org/devel/kubic/containers/container/kubic/kube-apiserver:v1.31.0-15.90

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.