Update docker install ubuntu to use the following

[craig8]

https://docs.docker.com/engine/install/ubuntu/#install-using-the-repository

Instead of the current script, we should use the two installation commands on the above page.

This will give use the newer syntax

docker compose up/down

And not the deprecated

docker-compose up/down

There are differences, but for the commands we use on this project they are not much. The biggest change is making sure our documentation uses this.