Update README.md #9

	name: Test build Jekyll site without deploying

	on:
	# Runs on pushes targeting the default branch
	pull_request:
	branches: ["main"]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read

	# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
	# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
	concurrency:
	group: "build_pr"
	cancel-in-progress: true

	jobs:
	# Build job
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: 'true'
	- name: Build docker image
	run: docker build -t local < Dockerfile.devel
	- name: Test build
	run: docker run -it local make build

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