Merge pull request #139 from nismod/remove_obsolete_target_rule #49

	# https://github.com/rust-lang/mdBook/wiki/Automated-Deployment%3A-GitHub-Actions#github-pages-deploy
	name: mdBook Documentation
	on:
	push:
	branches:
	- main

	jobs:
	deploy:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Install mdbook
	run: \|
	mkdir mdbook
	curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.14/mdbook-v0.4.14-x86_64-unknown-linux-gnu.tar.gz \| tar -xz --directory=./mdbook
	echo `pwd`/mdbook >> $GITHUB_PATH
	- name: Deploy GitHub Pages
	run: \|
	# This assumes your book is in the root of your repository.
	# Just add a `cd` here if you need to change to another directory.
	cd docs
	mdbook build
	git worktree add gh-pages gh-pages
	git config user.name "Deploy from CI"
	git config user.email ""
	cd gh-pages
	# Delete the ref to avoid keeping history.
	git update-ref -d refs/heads/gh-pages
	rm -rf *
	mv ../book/* .
	git add .
	git commit -m "Deploy $GITHUB_SHA to gh-pages"
	git push --force

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