If you’re just using this as a demo, maybe try following one of the development install guides listed here: https://meta.discourse.org/docs?tags=dev-install
Point him to this guide for the hardware/software requirements: discourse/docs/INSTALL.md at main · discourse/discourse · GitHub.
This guide gives instructions for creating a installing a production Discourse site: discourse/docs/INSTALL-cloud.md at main · discourse/discourse · GitHub.