Adding missing `.readthedocs.yml` config file. #4

	name: Generate Documentation

	on:
	release:
	types: [published]
	push:
	branches:
	- main
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash
	strategy:
	fail-fast: false
	matrix:
	python-version: [3.8]
	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	persist-credentials: false
	fetch-depth: 0
	- name: Event type
	run: echo $EVENT_TYPE
	env:
	EVENT_TYPE: ${{ github.event_name }}
	- name: Install pandoc
	uses: r-lib/actions/setup-pandoc@v1
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip wheel setuptools
	python -m pip install -r requirements.txt
	python -m pip install -r docs/requirements.txt
	python -m pip list
	- name: Install sphinx-material
	run: python -m pip install -e . --no-build-isolation -v
	- name: Build documentation
	run: \|
	pushd docs
	O="-j auto" make html
	popd
	- name: Move and commit documentation
	env:
	GIT_TAG: ${{ github.event.release.tag_name }}
	run: \|
	source tools/docbuild-commit.sh
	- name: Push changes
	uses: ad-m/github-push-action@master
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	branch: gh-pages
	if: ${{ github.event_name == 'release' \|\| github.event_name == 'push' }}

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