docs: improve installation instructions #47

	name: Sphinx to GitHub Pages

	# Controls when the action will run.
	on:
	push:
	branches: [ master ]

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

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/checkout@v2

	- name: Build HTML docs
	run: docker run --rm -v $GITHUB_WORKSPACE:/workspace --workdir /workspace/docs sphinxdoc/sphinx sh -c "pip3 install -r requirements.txt; make html"

	# Create an artifact of the HTML output
	- uses: actions/upload-artifact@v2
	with:
	name: Documentation
	path: docs/_build/html/

	# Publish docs on gh-pages branch
	- name: Commit documentation
	run: \|
	mkdir gh-pages
	cp -r docs/_build/html/* gh-pages/
	cd gh-pages
	git init -b gh-pages
	touch .nojekyll
	git config --local user.email "[email protected]"
	git config --local user.name "GitHub Action"
	git add .
	git commit -m "Update documentation" -a \|\| true
	- name: Push documentation
	uses: ad-m/github-push-action@master
	with:
	branch: gh-pages
	directory: gh-pages
	github_token: ${{ secrets.GITHUB_TOKEN }}
	force: true

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