Update .gitlab-ci.yml

stages:

- build

- test

- release

variables:

  IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME

  CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME

  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest

before_script:

  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

build:

  tags:

    - ninux

    - docker

  stage: build

  script:

    - docker build -t $IMAGE_TAG .

    - docker push $IMAGE_TAG

 No newline at end of file

    - docker build --pull -t $CONTAINER_TEST_IMAGE .

    - docker push $CONTAINER_TEST_IMAGE

test:

  tags:

    - docker

  stage: test

  script:

    - docker pull $CONTAINER_TEST_IMAGE

    # Test running the container.

    - docker run --name test-container -d --privileged -v /sys/fs/cgroup:/sys/fs/cgroup:ro $CONTAINER_TEST_IMAGE /lib/systemd/systemd

    # Verify Ansible is available in the container.

    - docker exec --tty test-container env TERM=xterm ansible --version

release-image:

  tags:

    - ninux

    - docker

  stage: release

  script:

    - docker pull $CONTAINER_TEST_IMAGE

    - docker tag $CONTAINER_TEST_IMAGE $CONTAINER_RELEASE_IMAGE

    - docker push $CONTAINER_RELEASE_IMAGE

  only:

    - master