This will run anwhere PHP will run. PHP is pretty much just to avoid copy/paste of the header and footer. There is a Dockerfile, but any Apache-like setup will work. The .htaccess file differs a little on the production server as it handles https://www redirection from the naked http domain.
There is no build system as it's all vanilla JS and CSS since this is a straightforward webpage and not an app. JS just exists for the mobile menu dropdown.
A11y is important so all images must have alt text. Color contrast is also important. Use Google's Lighouse tool to verify your changes are accessible.