Add support and docs for Gitlab CI

Trying to use lhci in Gitlab-CI. I am getting a CHROME_PATH must be set... error. See logs below:

291 $ yarn test:lighthouse
292 yarn run v1.19.1
293 $ lhci autorun
294 ✅  .lighthouseci/ directory writable
295 ✅  Configuration file found
296 ⚠️   GitHub token not set
297 Healthcheck passed!
298 Automatically determined ./public as `staticDistDir`.
299 Set it explicitly in lighthouserc.json if incorrect.
300 Started a web server on port 38319...
301 Running Lighthouse 3 time(s) on http://localhost:38319/404.html
302 Run #1...failed!
303 Error: Lighthouse failed with exit code 1
304     at ChildProcess.process.on.code (/builds/origenstudio/gatsby-starter-default/node_modules/@lhci/cli/src/collect/lighthouse-runner.js:102:21)
305     at ChildProcess.emit (events.js:198:13)
306     at Process.ChildProcess._handle.onexit (internal/child_process.js:248:12)
307 Runtime error encountered: The environment variable CHROME_PATH must be set to executable of a build of Chromium version 54.0 or later.

I’ve tried to use a service to install chrome. I have used the chromedp/headless-shell:latest docker image, however the error remains.

Has anyone configure lhci in Gitlab?

[gaurav5430]

In case it is helpful to someone, I have written about how I integrated lighthouse-ci and lighthouse ci server to my gitlab CI workflow as a proof of concept.

Here is the article: https://medium.com/@gaurav5430/web-performance-integrating-lightouse-ci-in-your-gitlab-ci-cd-pipeline-129c788591bd?source=friends_link&sk=ef3fdc7c3146ceae3432dd3b09c6e243

[Lusitaniae]

I’m having the same issue.

Solved by using circleci image and adding sudo to npm install -g @lhci/cli@0.3.x

perf_test:
  image: circleci/node:10.16-browsers
  stage: test
  script:
    - npm install
    - npm run build
    - sudo npm install -g @lhci/cli@0.3.x
    - |
      lhci collect  \
       --url=https://example.com \
       --upload.target=temporary-public-storage \
       --collect.settings.chromeFlags="--no-sandbox" \
      || echo "LHCI failed!"