add build workflow #2

	# vim:sw=2:ts=2
	# build html version of docs to check if it was successful
	name: build

	# on events
	on:
	pull_request:
	branches:
	- master
	- 'feature/*'

	jobs:
	sphinx-build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install sphinx sphinx_copybutton myst-parser furo pygments

	- name: Build docs
	run: \|
	make clean html

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