version: 2.1
jobs:
  build:
    docker: &shared_docker
      - image: circleci/node:12
    steps:
      - checkout # check out the code in the project directory
      - restore_cache:
          keys:
            - npm-v1-dependencies-{{ checksum "yarn.lock" }}
      - run: yarn global add node-gyp && yarn install
      - save_cache:
          key: npm-v1-dependencies-{{ checksum "yarn.lock" }}
          paths:
            - ./node_modules

  job2:
    docker: *shared_docker
    steps:
      - checkout
      - restore_cache:
          keys:
            - npm-v1-dependencies-{{ checksum "yarn.lock" }}
      - run: echo Hello World !

workflows:
  version: 2
  build_test:
    jobs:
      - build
      - job2