scat pos proof of life (screencasts)

i recorded a couple of quick screencasts to show cloning it from github and starting it up with docker-compose and going through the initial database setup and processing a sale with sample data.

like the website says, the system is a work in progress and not suitable for use by anyone, but we have been using it for more than ten years.

i am not sure if it is something that anyone else would want to use, but i figure one way to find that out is to at least start pushing it towards where that is even be feasible.