stages:
  - build

before_script:
  - docker info

build:
  stage: build
  image: docker:18.09.7-dind
  services:
    - docker:18.09.7-dind
  variables:
    DOCKER_DRIVER: overlay
    DOCKER_HOST: tcp://localhost:2375/
  before_script:
    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
  script:
    - docker build --pull -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" .
    - docker push "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG"