Add DOI to README #611

	name: Build Docs with Sphinx
	on: [push, pull_request]
	env:
	PIP_INSTALL: python -m pip install
	SPHINX: python -m sphinx -W --keep-going --color
	jobs:
	docs:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Install pandoc
	run: \|
	sudo apt-get install --no-install-recommends pandoc
	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: "3"
	- name: Show Python version
	run: \|
	python --version
	- name: Install Python package
	run: \|
	$PIP_INSTALL .
	- name: Install docs dependencies
	run: \|
	$PIP_INSTALL -r doc/requirements.txt
	- name: Build HTML
	run: \|
	$SPHINX doc/ _build/html/ -d _build/doctrees/ -b html
	- name: Upload HTML
	uses: actions/upload-artifact@v4
	with:
	name: HTML
	path: _build/html/
	- name: Build LaTeX sources
	run: \|
	$SPHINX doc/ _build/latex/ -d _build/doctrees/ -b latex
	- name: Run LaTeX
	uses: dante-ev/latex-action@master
	with:
	working_directory: _build/latex
	root_file: splines.tex
	- name: Upload PDF
	uses: actions/upload-artifact@v4
	with:
	name: PDF
	path: _build/latex/splines.pdf
	- name: Check links
	run: \|
	$SPHINX doc/ _build/linkcheck/ -d _build/doctrees/ -b linkcheck
	- name: Upload linkcheck results
	uses: actions/upload-artifact@v4
	if: ${{ success() \|\| failure() }}
	with:
	name: linkcheck
	path: _build/linkcheck/output.*

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