This container can be pulled via:
  docker pull registry.opensuse.org/opensuse/factory/riscv/totest/containers/opensuse/alertmanager:0.33
  docker pull registry.opensuse.org/opensuse/factory/riscv/totest/containers/opensuse/alertmanager:0.33.0
  docker pull registry.opensuse.org/opensuse/factory/riscv/totest/containers/opensuse/alertmanager:0.33.0-41.4
  docker pull registry.opensuse.org/opensuse/factory/riscv/totest/containers/opensuse/alertmanager:latest

Set DOCKER_CONTENT_TRUST=1 to enable image tag verification.