.docker-in-docker:
  services:
    - name: docker:20.10.19-dind
      command:
        - "--registry-mirror"
        - "https://nexus.corp.exxcellent.de:18000"
        - "--insecure-registry"
        - "nexus.corp.exxcellent.de:18000"
        - "--insecure-registry"
        - "gitlab.exxcellent.de:4567"
        # explicitly disable tls to avoid docker startup interruption
        - "--tls=false"
      alias: docker
  variables:
    # Instruct Testcontainers to use the daemon of DinD.
    DOCKER_HOST: "tcp://docker:2375"
    # Instruct Docker not to start over TLS.
    DOCKER_TLS_CERTDIR: ""
    # Improve performance with overlayfs.
    DOCKER_DRIVER: overlay2
    # Needed by testcontainers https://www.testcontainers.org/supported_docker_environment/continuous_integration/gitlab_ci/
    TESTCONTAINERS_HOST_OVERRIDE: "docker"