Apache is a free and open-source cross-platform web server software.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
PHP is a general-purpose scripting language used for web development.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.
Simple Analytics is a privacy-friendly Google Analytics alternative.
A modest JavaScript framework for the HTML you already have.