Add .readthedocs.yaml file #37

	name: GitHub Pages

	on:
	push:
	branches: [ main ]
	pull_request:

	jobs:
	deploy:
	runs-on: ubuntu-20.04
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	steps:
	- uses: actions/checkout@v2

	- name: Setup Python
	uses: actions/setup-python@v2
	with:
	python-version: '3.8'

	- name: Upgrade pip
	run: \|
	# install pip=>20.1 to use "pip cache dir"
	python3 -m pip install --upgrade pip

	- name: Get pip cache dir
	id: pip-cache
	run: echo "::set-output name=dir::$(pip cache dir)"

	- name: Cache dependencies
	uses: actions/cache@v2
	with:
	path: ${{ steps.pip-cache.outputs.dir }}
	key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
	restore-keys: \|
	${{ runner.os }}-pip-

	- name: Install dependencies
	run: python3 -m pip install -r ./requirements-docs.txt

	- name: Install itself
	run: python3 -m pip install -e .

	- run: mkdocs build

	- name: Deploy
	uses: peaceiris/actions-gh-pages@v3
	if: ${{ github.ref == 'refs/heads/main' }}
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: ./site

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