This episode of #ProgrammingByStealth is a Tidbit written/taught by Helma van der Linden. @bart wanted to understand Docker better, and Helma has some great use cases for how to use it for developer setups, so it was a good opportunity for Bart to learn from Helma.
The material is quite long, so the podcast was recorded in 2 segments, Tidbit 17a and b. Tidbit b will be along shortly, and picks up at the heading entitled "Reusing the Docker image".