image: docker:latest
services:
  - docker:dind

stages:
  - build

variables:
  IMAGE_TAG: $CI_REGISTRY_IMAGE:latest
  NAME: $CI_PROJECT_NAME

build_and_push:
  stage: build
  only:
    - master
  script:
    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
    - docker build -t $IMAGE_TAG .
    - docker push $IMAGE_TAG

only_build:
  stage: build
  except:
    - master
  script:
    - docker build -t $IMAGE_TAG .