I don't really have anywhere to announce things like this yet, so figured
wikidata-tech will do.
I have just merged https://github.com/wmde/wikibase-docker/pull/13
This change means that the new build of 0.3.0 (in progress) will actually
require a rebuild of the blazegraph index.
If you don't want to have to do this then don't pull the new image from