config.yml

version: 2.1
executors:
  default:
    docker:
      - image: circleci/node:12
    working_directory: ~/my-app
commands:
  restore_yarn:
    steps:
      - restore_cache:
          key: yarn-v1-{{ checksum "yarn.lock" }}-{{ arch }}-{{ .Branch }}
  save_yarn:
    steps:
      - save_cache:
          key: yarn-v1-{{ checksum "yarn.lock" }}-{{ arch }}-{{ .Branch }}
          paths:
            - ~/.cache/yarn
  restore_node:
    steps:
      - restore_cache:
          key: node-v1-{{ checksum "package.json" }}-{{ arch }}-{{ .Branch }}
  save_node:
    steps:
      - save_cache:
          key: node-v1-{{ checksum "package.json" }}-{{ arch }}-{{ .Branch }}
          paths:
            - node_modules
jobs:
  node:
    executor:
      name: default
    steps:
      - checkout
      - restore_yarn
      - restore_node
      - run: yarn
      - save_yarn
      - save_node
workflows:
  build:
    jobs:
      - node