This is a backend service skeleton or boilerplate to speed up development process. Over time, this package has become opinionated and behaves more like a framework with a set of predefined features.
Pi 1 and 2 are not supported due to the lack of onboard Wi-Fi Pi Zero 1 (W) is not supported due to the old architecture In Raspberry Pi Imager, choose your Pi model, use "Use custom" in "Choose OS", ...