The wikibase release pipeline contains scripts used for building, testing and publishing Wikibase docker images and tarballs.
It contains a set of build targets defined in the Makefile which can be executed in two different ways.
When building, use the build.sh wrapper script to do the building inside a docker-container, this way files aren't littered around the repository but only in the artifacts/ directory.
For testing, you can use test, test-all make targets.
The pipeline documentation can be found here.