Docker 101 - Creation to Deployment
Why doesn't a single one of these kinds of article about using Docker explain to new users how to actually update an image, when a new version is released without needing to rebuild it and remember the exact same settings and parameters as before?
Even Fedora's Cockpit front-end to Docker fails to have any kind of mechanism to update images or even change/export current settings. You can create new containers, start/stop and delete them, but no update image.
If you're looking for a more in depth training experience about Docker, check out the play-with-docker website. It has all sorts of great material and a beginner guide with an in browser CLI that you can do all the commands in. Really helped me grasp Docker. Taomyn