solr service - add the possibility to have solr core automatically created + configSet applied

it would be nice if we can create a default core automatically, so we don't have to run

docker exec -it container_name make create core=default -f /usr/local/bin/actions.mk

each time we set up the environment. But this one might be tricky, as we can create a core once the solr server is up inside a container.

Edited Jun 16, 2023 by Dejan