image: docker:latest

# When using dind, it's wise to use the overlayfs driver for
# improved performance.
variables:
  DOCKER_DRIVER: overlay 
  IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
  IMAGE_LATEST: $CI_REGISTRY_IMAGE:latest

services:
- docker:dind

stages:
  - build
  - deploy

before_script:
  - docker info
  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

build:
  stage: build
  script:
    - docker build -t $IMAGE_TAG .

deploy:
  stage: deploy
  script:
    - docker build -t $IMAGE_TAG -t $IMAGE_LATEST .
    - docker push $CI_REGISTRY_IMAGE
  only:
    - tags