This is the source code for the boost website. It's automatically updated from the master branch. The beta website is available for testing and experiments, and is automatically updated from the beta branch.
If you want to edit the website, or run it locally, see the guide to updating the website.
To add to the release notes, create a pull request for the appropriate file in the history directory. You can preview the release notes for upcoming releases at the in progress release page. This is updated once an hour.