[tikkabhuna]

We use Google Jib with Gradle (https://github.com/GoogleContainerTools/jib) and love it. It does some slight optimisations (just use the classes rather than jars) and removes some decision making about where files are laid out.

It also builds into the Gradle lifecycle neatly. I don't need a separate tool for building images.

I'm sure writing Maven xml wouldn't be fun though!