Add CI for docker artifact

.docker:

  stage: build

  image: docker:git

  services:

    - docker:dind

  tags:

    - generic_privileged

  before_script:

    - echo $CI_JOB_TOKEN | docker login -u gitlab-ci-token --password-stdin $CI_REGISTRY

docker:

  extends: .docker

  script:

    - docker build -t $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG -f app/Dockerfile app

  rules:

    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'

docker-latest:

  extends: .docker

  script:

    - docker build -t $CI_REGISTRY_IMAGE:latest -f app/Dockerfile app

    - docker push $CI_REGISTRY_IMAGE:latest

  rules:

    - if: '$CI_COMMIT_REF_NAME == "main" && $CI_PIPELINE_SOURCE != "schedule"'

docker-tag:

  extends: .docker

  script:

    - docker build -t $CI_REGISTRY_IMAGE:${CI_COMMIT_TAG/v/} -f app/Dockerfile app

    - docker push $CI_REGISTRY_IMAGE:${CI_COMMIT_TAG/v/}

  rules:

    - if: '$CI_COMMIT_TAG'