These files can be hosted on virtually any webserver 'as is' and can likewise be contemplated offline. The main archive (for example buddadust-18a27) contains a /resources/ directory where the other optional archives (such as e-pub, pdf, zip) should be expanded.
The git repository, which contains all HTML and resources (except large audio, e-pub, pdf, and zip archives), was last updated 21 October, 2020 is publicly hosted on GitHub:
git clone https://github.com/alexgenaud/buddhadust.git
The nightly zip archives are likely the latest versions of the BuddhaDust content. Nightly zip archives may contain the full site, sans EPUB, PDF, and ZIP (ex buddhadust-18701.zip) or may contain only the latest text/HTML with no resources, not even images (ex buddhadust-no-resources-18728.zip) or may contain only e-pub, pdf, or zip (with obvious names). Below are the latest nightly archives.