This is how I started in a tiny room. I am not proud, but maybe good to show between all the shiny things here.

Just a warning: this takes pretty much every bad FF trope you can think of and turns it to max. Awful reading.

Bullshit. I can use docker without the docker hub very easily. Anyone can host docker images, and docker allows this, no weird hacks needed.

Docker does not lock you in with the docker hub though. So no hostage taking.