message: docs: describe how to run tests in GitLab CI
  The documentation has a very useful configuration for Travis and CircleCI but not for GitLab CI.
  So, I thought that might be useful to have that as well.
  PR Close
diff: @@ -219,6 +219,59 @@ You'll need to push a new commit to trigger a build.
  * Learn more about Travis CI testing from [Travis CI documentation](https://docs.travis-ci.com/).
  +### Configure project for GitLab CI
  +
  +Step 1: Create a file called `.gitlab-ci.yml` at the project root, with the following content:
  +
  +```
  +image: node:14.15-stretch
  +variables:
  + FF_USE_FASTZIP: "true"
  +
  +cache:
  + untracked: true
  + policy: push
  + key: ${CI_COMMIT_SHORT_SHA}
  + paths:
  + - node_modules/
  +
  +.pull_cached_node_modules:
  + cache:
  + untracked: true
  + key: ${CI_COMMIT_SHORT_SHA}
  + policy: pull
  +
  +stages:
  + - setup
  + - test
  +
  +install:
  + stage: setup
  + script:
  + - npm ci
  +
  +test:
  + stage: test
  + extends: .pull_cached_node_modules
  + before_script:
  + - apt-get update
  + - wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
  + - apt install -y ./google-chrome*.deb;
  + - export CHROME_BIN=/usr/bin/google-chrome
  + script:
  + - npm run test -- --no-watch --no-progress --browsers=ChromeHeadlessCI
  + - npm run e2e -- --protractor-config=e2e/protractor-ci.conf.js
  +```
  +
  +This configuration caches `node_modules/` in the `install` job and re-uses the cached `node_modules/` in the `test` job.
  +
  +Step 2: [Sign up for GitLab CI](https://gitlab.com/users/sign_in) and [add your project](https://gitlab.com/projects/new).
  +You'll need to push a new commit to trigger a build.
  +
  +Step 3: Commit your changes and push them to your repository.
  +
  +* Learn more about GitLab CI testing from [GitLab CI/CD documentation](https://docs.gitlab.com/ee/ci/).
  +
  ### Configure CLI for CI testing in Chrome
  When the CLI commands `ng test` and `ng e2e` are generally running the CI tests in your environment, you might still need to adjust your configuration to run the Chrome browser tests.
  