I'm not sure I follow the analogy. I'm guessing the mess represents a messy filesystem/environment. What does the bed represent? A Dockerfile? Dockerfiles are w

I'm not sure I follow the analogy. I'm guessing the mess represents a messy filesystem/environment. What does the bed represent? A Dockerfile? Dockerfiles are way more transparent than, say, a random server's / directory. That's just my opinion of course. It's possible to write confusing Dockerfiles but really they're mostly just shell scripts. And the idea of "Linux on top of Docker" seems a bit odd - there's only ever one Linux kernel no matter how many containers you have running. Docker is built on Linux.