docker-backuppc/.circleci/config.yml

# Configure CircleCI
version: 2
jobs:
  build:
    machine: true
    steps:
      - checkout
      - setup_remote_docker:
          docker_layer_caching: true
      - run: 
          command:
            docker build -t adferrand/backuppc:${CIRCLE_TAG} .
      - run:
          command: |
            mkdir -p workspace
            docker save adferrand/backuppc:${CIRCLE_TAG} > workspace/docker-backuppc.tar            
      - persist_to_workspace:
          root: workspace
          paths:
            - docker-backuppc.tar
  deploy:
    machine: true
    steps:
      - attach_workspace:
          at: /tmp/workspace
      - setup_remote_docker:
          docker_layer_caching: true
      - run:
          command:
            docker load < /tmp/workspace/docker-backuppc.tar
      - run: 
          command:
            docker login -u ${DOCKER_USER} -p ${DOCKER_PASS}
      - deploy: 
          command:
            docker push adferrand/backuppc:${CIRCLE_TAG}
workflows:
  version: 2
  build-n-deploy:
    jobs:
      - build:
          filters:
            tags:
              only: ^[0-9.]+
      - deploy:
          requires: 
            - build
          filters:
            tags:
              only: ^[0-9.]+