If it’s only on your local network, you can achieve this pretty easily with python’s built in http web server. Find a site that transforms urls into QR codes, save them in a directory on your computer, slap some html and css in there to present the QR code images how you want, and create a few simple routes for the corresponding images. Put it all in a index.html file, then open a terminal in that folder and type
python3 -m http.server
Read the docs on that command to specify the address and such. You’ll need that to be consistent for the QR code generation step.
They would know I guess