Experiment with Futurecoder site

[zorn]

https://futurecoder.io/

Seems neat. Should try it out and document when I like and dislike.

[zorn]

Also: https://www.boot.dev/

[zorn]

Also: https://elixirforum.com/t/open-source-liveview-app-to-create-interactive-courses/59818

[zorn]

Also: https://moodle.org/