This container can be pulled via:
  docker pull registry.opensuse.org/devel/bci/sle-15-sp4/containerfile/bci/bci-sle15-kernel-module-devel:15.4
  docker pull registry.opensuse.org/devel/bci/sle-15-sp4/containerfile/bci/bci-sle15-kernel-module-devel:15.4.1.31

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.