docs: Add contribution guidelines

docs/contributing/documentation.rst

@@ -0,0 +1,39 @@
+.. _documentation:
+
+Documentation
+-------------
+
+VyOS documentation is written in reStructuredText and generated to Read the Docs
+pages with Sphinx, as per the Python tradition, as well as PDF files for offline
+use through LaTeX.
+
+Guidelines
+^^^^^^^^^^
+
+There are a few small things to keep in mind when contributing to the
+documentation, for the sake of consistency and readability. When in doubt,
+follow the style of existing documentation.
+
+Remember that the reStructuredText files aren't exclusively for generating
+HTML and PDF. They should be human-readable and easily perused from a console.
+
+- Use American English at all times. A spell checker can be helpful for this.
+- Don't forget to update `index.rst` when adding a new node.
+- Try not to exceed 80 characters per line, but don't break URLs over this.
+- Properly quote commands, filenames and brief code snippets with backticks.
+- Use literal blocks for longer snippets.
+- Leave a newline before and after a header.
+- Indent with two spaces.
+
+Building
+^^^^^^^^
+
+The source is kept in the Git repository
+https://github.com/vyos/vyos-documentation
+
+You can follow the instructions in the README to build and test your changes.
+
+You can either install Sphinx (and TeX Live for PDF output) and build the
+documentation locally, or use the `Dockerfile`_ to build it in a container.
+
+.. _Dockerfile: https://github.com/vyos/vyos-documentation/blob/master/docker/Dockerfile

docs/contributing/index.rst

@@ -7,5 +7,6 @@ Contributing
 
    build-vyos
    development
+   documentation
    issues-features
-   upstream-packages
+   upstream-packages