zulip/docs/README.md

These docs are written in Commonmark Markdown with a small bit of rST. We've chosen Markdown because it is easy to write. The docs are served in production at zulip.readthedocs.io.

If you want to build the documentation locally (e.g. to test your changes), the dependencies are automatically installed as part of Zulip development environment provisioning, and you can build the documentation using:

cd docs/
make html

You can also usually test your changes by pushing a branch to GitHub and looking at the content on the GitHub web UI, since GitHub renders Markdown.

When editing the dependencies for the Zulip documentation, you'll want to edit both the root requirements.txt as well as docs/requirements.readthedocs.txt (which is used by ReadTheDocs to build the documentation quickly, without installing all of Zulip's dependencies).