feat: Adds github action for linktesting #7

	# .github/workflows/htmltest.yml
	# Run htmltest link checker on generated HTML output from user guide

	name: Link check with htmltest

	on:
	workflow_dispatch:
	pull_request:

	jobs:
	htmltest:
	runs-on: ubuntu-latest
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	steps:
	- name: Checkout code
	uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
	with:
	submodules: 'recursive'

	- name: Set up Hugo
	uses: peaceiris/actions-hugo@16361eb4acea8698b220b76c0d4e84e1fd22c61d # v2.6.0
	with:
	hugo-version: '0.110.0'
	extended: true

	- name: Set up Node
	uses: actions/setup-node@64ed1c7eab4cce3362f8c340dee64e5eaeef8f7c # v3.6.0
	with:
	node-version: 16

	- name: Install dependencies
	run: \|
	cd themes/docsy
	npm install

	- name: Set up PostCSS
	run: npm install --save-dev autoprefixer postcss-cli postcss

	- name: Build
	run: hugo

	- name: Test HTML
	# https://github.com/wjdp/htmltest-action/
	continue-on-error: false # <- Set to true if run shouldn't fail with broken links
	uses: wjdp/htmltest-action@master
	with:
	config: .htmltest.yml
	path: public

	- name: Archive htmltest results
	uses: actions/upload-artifact@v3
	with:
	name: htmltest-report
	path: tmp/.htmltest/htmltest.log
	retention-days: 7 # default is 90 days

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