What are the system requirements to run ShowFlower?

Minimal.

The ShowFlower server software just needs a several years old pc, mac, minipc, etc. It installs on MS Windows 11, OSX, or Linux.

A wired or wireless network is required for client devices.

Client devices require a modern Browser (Edge,Chrome, FireFox, Safari) and can be MS Windows, OSX, Linux, Android,  & IOS devices.

If it has a web browser, it will run the ShowFlower Client.