This website is a tiny example of reactionary software. The UI is clean and simple, not fashionable. View the HTML source in the browser. Unlike all modern websites, the HTML here is readable. Now look at the source which is in Mercurial. And the code is written in Luan which makes it simple.
Also note that this website uses HTTP, not HTTPS. Using HTTPS is completely pointless for an informational site like this one that has no need for security. Yet all modern browsers complain, warning the user that the site is "Not Secure". Why do they do this? Because modern programmers hate simplicity and love complexity, and using HTTPS for a site that doesn't need security just adds complexity, so they complain because they hate the simplicity of HTTP.