i've made a few docker images, but still find it hard to answer the question.
it's like a virtual machine, but it's not a virtual machine, but it does require a virtual machine to run on osx.
it's like the inside of a car, and instead of getting new cars you just change out the interior - and the car might be a virtual machine, so by switching out the upholstry you can ride inside a mercedes even though the vehicle was made by ford.
except noone uses this car in production.
and you can download cars from dockerhub, but they might crash.

















