I don't use docker in production, I use it for in-house or local development tooling. e.g. gitlab, mailhog

Docker is great! Drink the Kool-aid. Cost of entry isn't much... You can run docker containers pretty much anywhere. You can spin up a complete development environment with web server, database server, messaging queue, and nodejs in one simple swoop on your macbook from a single call to your docker-compose config. Then you can move on to remote into one of your pet Ubuntu servers and run the same config for a quick dev environment. Later, you can take the same dockerized instances of services and spin them up on Kubernetes, Marathon, GCS, or AWS ECR with automatic scaling policies.

This is a pretty good article outlining the simplicity of "cattle" instances: factual.com/blog/docker-mesos-marathon-and-the-en…

docs.docker.com/engine/understanding-docker

https://prakhar.me/docker-curriculum/

Everything, even certain Desktop apps that I like to snapshot or rollback like a specific IDE setups I use for one client.

I'm more a Vagrant user but i want to learn docker and maybe ansible