If you take 'figuring out Docker' as an open-ended problem then it makes sense. Getting an app running in a container is relatively easy, but that isn't really

If you take 'figuring out Docker' as an open-ended problem then it makes sense. Getting an app running in a container is relatively easy, but that isn't really 'figuring out Docker'. That's just scratching the surface. Learning how to optimize that container, make it secure, put it in a registry so you can reuse it, etc means there's a lot to get through before you can say "I've got Docker figured out." There's no 'Done' when it comes to learning Docker. That makes it a harder problem in many people's opinions.