Check Gastby site for broken links using CircleCI

circle.yml

version: 2
jobs:
  build:
    working_directory: ~/repo
    docker:
      - image: circleci/node:10
    steps:
      - checkout

      - run:
          name: install-yarn
          command: yarn install --quiet
      - run:
          name: install-testing-utils
          command: yarn global add alexlouden/broken-link-checker --quiet
      - run:
          name: build
          command: yarn build
      - run:
          name: serve
          command: yarn serve
          background: true
      - run:
          name: install dockerize
          command: wget https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz && sudo tar -C /usr/local/bin -xzvf dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz && rm dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz
          environment:
            DOCKERIZE_VERSION: v0.3.0
      - run:
          name: Wait for serve
          command: dockerize -wait tcp://localhost:9000 -timeout 5m
      - run:
          name: test
          command: yarn blc -q -r -o http://localhost:9000/

package.json

{
  "name": "your_gastby_project",
  "scripts": {
    "build": "gatsby build",
    "dev": "gatsby develop",
    "serve": "gatsby serve",
    "blc": "blc",
  }
}