Node Port: Service Enable, Disable and ports availability checks

[tonysm]

Changed

• Refactor to dockerode type structure

Added

• Adds the first implementation of the enable and disable commands. There are some todos in the code right now, but the gist is there and things are working on my end.
• Adds the port availability check to services. This uses Oclif's validation and relies on having netstat installed. Netstat install instructions were also added to the README in this branch

---

This PR brings in the most recent changes that @josecanhelp did for the main port-to-node branch. Thanks @josecanhelp

[tonysm]

I'm merging this directly this since it still goes into a WIP branch. I'll clean up the other branches accordingly.