create base for readthedocs sphinx site

Makefile

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+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

source/conf.py

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+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = 'darker'
+copyright = '2020–2024, Antti Kaihola'
+author = 'Antti Kaihola'
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = []
+
+templates_path = ['_templates']
+exclude_patterns = []
+
+root_doc = 'index'
+
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = 'alabaster'
+html_static_path = ['_static']

source/index.rst

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+Welcome to Darker's Documentation!
+===================================
+
+|build-badge| |license-badge| |pypi-badge| |downloads-badge| |black-badge| |changelog-badge|
+
+.. |build-badge| image:: https://github.com/akaihola/darker/actions/workflows/python-package.yml/badge.svg
+   :alt: master branch build status
+   :target: https://github.com/akaihola/darker/actions/workflows/python-package.yml?query=branch%3Amaster
+.. |license-badge| image:: https://img.shields.io/badge/License-BSD%203--Clause-blue.svg
+   :alt: BSD 3 Clause license
+   :target: https://github.com/akaihola/darker/blob/master/LICENSE.rst
+.. |pypi-badge| image:: https://img.shields.io/pypi/v/darker
+   :alt: Latest release on PyPI
+   :target: https://pypi.org/project/darker/
+.. |downloads-badge| image:: https://pepy.tech/badge/darker
+   :alt: Number of downloads
+   :target: https://pepy.tech/project/darker
+.. |black-badge| image:: https://img.shields.io/badge/code%20style-black-000000.svg
+   :alt: Source code formatted using Black
+   :target: https://github.com/psf/black
+.. |changelog-badge| image:: https://img.shields.io/badge/-change%20log-purple
+   :alt: Change log
+   :target: https://github.com/akaihola/darker/blob/master/CHANGES.rst
+
+What is Darker?
+===============
+
+.. include:: ../README.rst
+   :start-after: What?
+   :end-before: Why?
+
+Why Darker?
+===========
+
+.. include:: ../README.rst
+   :start-after: Why?
+   :end-before: How?
+
+How Does Darker Work?
+=====================
+
+.. include:: ../README.rst
+   :start-after: How?
+   :end-before: Example
+
+Examples
+========
+
+.. include:: ../README.rst
+   :start-after: Example
+   :end-before: Customizing ``darker``
+
+Customizing Darker, Black, isort, and flynt
+==========================================
+
+.. include:: ../README.rst
+   :start-after: Customizing ``darker``
+   :end-before: Using as a pre-commit hook
+
+GitHub Actions Integration
+==========================
+
+.. include:: ../README.rst
+   :start-after: GitHub Actions integration
+   :end-before: Syntax highlighting
+
+Syntax Highlighting in Darker
+=============================
+
+.. include:: ../README.rst
+   :start-after: Syntax highlighting
+   :end-before: Guarding against Black compatibility breakage
+
+Guarding Against Black Compatibility Breakage
+=============================================
+
+.. include:: ../README.rst
+   :start-after: Guarding against Black compatibility breakage
+   :end-before: How does it work?
+
+How Darker Works
+================
+
+.. include:: ../README.rst
+   :start-after: How does it work?
+   :end-before: Limitations and work-arounds
+
+Limitations and Work-arounds
+============================
+
+.. include:: ../README.rst
+   :start-after: Limitations and work-arounds
+   :end-before: License
+
+License
+=======
+
+.. include:: ../README.rst
+   :start-after: License
+   :end-before: Prior art
+
+Prior Art
+=========
+
+.. include:: ../README.rst
+   :start-after: Prior art
+   :end-before: Contributors ✨
+
+Contributors
+============
+
+.. include:: ../README.rst
+   :start-after: Contributors ✨
+