This container can be pulled via:
  docker pull registry.opensuse.org/home/fcrozat/matryoshka/containerfile/bci/openjdk:15
  docker pull registry.opensuse.org/home/fcrozat/matryoshka/containerfile/bci/openjdk:15.0.5
  docker pull registry.opensuse.org/home/fcrozat/matryoshka/containerfile/bci/openjdk:15.0.5.1.41

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.