image: docker:latest
services:
- docker:dind

stages:
- build

variables:
  IMAGE: registry.gitlab.com/$CI_PROJECT_PATH

before_script:
  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN registry.gitlab.com

build:
  stage: build
  script:
    - docker build --pull -t $IMAGE:master centurion
    - docker push $IMAGE:master