This install scripts will help you installing Alby Hub on a Raspberry Pi with Raspberry Pi OS (previously called Raspbian). You should have some basic Linux understanding to install and operate it.
SSH into your Pi and run:
/bin/bash -c "$(curl -fsSL https://getalby.com/install/hub/pi-zero-install.sh)"
SSH into your Pi and cd into /opt/albyhub
Run ./update.sh