Thank you for the excellent discussion this evening! The links I presented are below. Have a super week!
Lynda.com full course on Docker (your public library likely provides free access to Lynda.com, please check your library’s web site – if you live or work in the City of Troy, the site is http://www.troypl.org/): https://www.lynda.com/Docker-tutorials/
Getting Started with Docker (Linux, Mac, Windows, AWS, Azure): https://docs.docker.com/engine/
The one I started with: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04
Quick example building up a web application: http://anandmanisankar.com/posts/docker-container-nginx-node-redis-example/
One of the hardened / specialized Linux-based operating systems to run containers: https://mesosphere.com/blog/2016/04/19/open-source-dcos/