This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/bci/spack:0.22
  docker pull registry.opensuse.org/opensuse/bci/spack:0.22.2
  docker pull registry.opensuse.org/opensuse/bci/spack:0.22.2-30.7
  docker pull registry.opensuse.org/opensuse/bci/spack:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.