This container can be pulled via:
  docker pull registry.opensuse.org/home/fcrozat/matryoshka/containerfile/bci/golang:1.16
  docker pull registry.opensuse.org/home/fcrozat/matryoshka/containerfile/bci/golang:1.16.5
  docker pull registry.opensuse.org/home/fcrozat/matryoshka/containerfile/bci/golang:1.16.5.18.40

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.