This is an example of a very simple website that includes some of the basic elements that are required to build any website whithout using any fancy tooling or frameworks (with the exception of Bootstrap, since I am incapable of making something look good without some help).
I am writing an article on Medium that describes my reasoning for going back to basics with this site in the meantime, I'll use it to link to a few of the other things I'm doing.
Here is a link to the very simplest page I could manage.
This site is built from the Bootstrap starter example which includes Bootstrap 5 via the jsDelivr CDN and is hosted on GitHub Pages
You can clone the repo that I built this site with and run it from your local file system (depending on your browser security settings)