jobs: 
  hello: 
    docker: 
      - 
        image: "circleci/node:12"
    steps: 
      - checkout
      - 
        run: "echo \"hello world\""
        
  install: 
    docker: 
      - 
        image: "circleci/node:12"
    steps:
      - checkout
      - restore_cache:
         key: yarn-packages-{{ checksum "yarn.lock"}}
      - run : yarn global add node-gyp 
      - run : yarn install
      - save_cache:
         key: yarn-packages-{{ checksum "yarn.lock"}}
         paths:
          - ./node_modules
orbs: 
  node: circleci/node@3.0.0
version: 2.1
workflows: 
  tests: 
    jobs: 
      - hello
      - install