A CircleCI configuration for Express, MongoDB, Puppeteer (testing) and Heroku (deployment)

config.yml

version: 2
jobs:
  build:
    docker:
      - image: circleci/node:9.2.0-browsers
      - image: circleci/mongo:latest

    steps:
      - checkout
      - restore_cache:
          keys:
            - v1-dependencies-{{ checksum "package.json" }}
            - v1-dependencies-
      - run: npm install
      - save_cache:
          paths:
            - node_modules
          key: v1-dependencies-{{ checksum "package.json" }}
      - run: npm test

  deploy:
    docker:
      - image: buildpack-deps:trusty
    steps:
      - checkout
      - run:
          name: Deploy Master to Heroku
          command: |
            git push https://heroku:$HEROKU_API_KEY@git.heroku.com/floating-savannah-66501.git master

workflows:
  version: 2
  build-deploy:
    jobs:
      - build
      - deploy:
          requires:
            - build
          filters:
            branches:
              only: master