version: 2

jobs:
  install-npm-packages:
    docker:
      - image: node:10.15.3
    steps:
      - checkout
      - restore_cache:
          keys:
            - node-modules-{{ .Branch }}-{{ checksum "package-lock.json" }}
      - run:
          name: Install npm packages
          command: npm install
      - save_cache:
          key: node-modules-{{ .Branch }}-{{ checksum "package-lock.json" }}
          paths:
            - node_modules

 workflows:
  version: 2
  main:
    jobs:
      - install-npm-packages