Add howto for git modules #1309

	name: Deploy Jekyll site to Pages

	on:
	pull_request:
	paths:
	- 'docs/**'
	- '.github/workflows/pages.yml'
	push:
	branches:
	main
	paths:
	- 'docs/**'
	- '.github/workflows/pages.yml'
	workflow_dispatch:

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read
	pages: write
	id-token: write

	concurrency:
	group: "${{ github.workflow }}-${{ github.head_ref \|\| github.ref }}"
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	show-progress: 'false'
	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: '3.3' # Not needed with a .ruby-version file
	bundler-cache: true # runs 'bundle install' and caches installed gems automatically
	cache-version: 0 # Increment this number if you need to re-download cached gems
	working-directory: docs/
	- name: Setup Pages
	id: pages
	uses: actions/configure-pages@v5
	- name: Build with Jekyll
	run: \|
	cd docs
	bundle exec jekyll build
	- name: Upload artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: docs/_site/

	deploy:
	if: github.ref == 'refs/heads/main'
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	needs: build
	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4

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