First Run Setup Scripts

[ADRFranklin]

It would make sense to have a way to run a script or command on the very first run of pico, to allow for setting up all the required tools, packages, and configurations for the system it is being run on.

This could be used for installing docker, setting up firewall, permissions, users, etc. Since pico is intended to be used with a master repo, that is responsible for deploying multiple services, it makes sense that the setup script would also be part of that initial repo, and with the option to run it when first being initialized, it just adds to ease of setting up deployments.