Run Lighthouse against the docs #1525

	name: Run Lighthouse against the docs

	on:
	# Run every night at midnight UTC.
	schedule:
	- cron: '0 0 * * *'

	jobs:
	lighthouseci:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	# Install Node and configure its cache.
	- uses: actions/setup-node@v4
	with:
	node-version: 20

	# https://github.com/actions/cache/blob/master/examples.md#node---yarn
	- name: Get yarn cache directory path
	id: yarn-cache-dir-path
	run: echo "::set-output name=dir::$(yarn cache dir)"

	- uses: actions/cache@v4
	id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
	with:
	path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
	key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
	restore-keys: \|
	${{ runner.os }}-yarn-

	# Install Ruby and configure the Bundler cache.
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.2.3

	# https://github.com/actions/cache/blob/master/examples.md#ruby---bundler
	- name: Set up Bundler cache
	uses: actions/cache@v4
	with:
	path: vendor/bundle
	key: ${{ runner.os }}-gems-${{ hashFiles('**Gemfile.lock') }}
	restore-keys: \|
	${{ runner.os }}-gems-

	# Build the documentation site.
	# This is needed so we can determine the list of URLs to test.
	- name: Build documentation site
	run: yarn build-decap

	# Run Lighthouse CI
	- name: Run Lighthouse CI
	run: yarn lhci autorun
	env:
	LHCI_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	- name: Attach results as artifact to GitHub Actions run
	if: ${{ always() }}
	uses: actions/upload-artifact@v4
	with:
	name: lighthouse-results
	path: .lighthouseci

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