Merge branch 'dev'

.docs/images/screenshots/ui-config-step-1.png

.docs/images/screenshots/ui.png

.docs/system-other-ui.md

.docs/system-services-gateway.md

.gitignore

.gitlab-ci.yml

Makefile

dbrepo-data-service/Dockerfile

dbrepo-data-service/pom.xml

dbrepo-data-service/report/pom.xml

dbrepo-data-service/rest-service/pom.xml

dbrepo-data-service/services/pom.xml

dbrepo-metadata-service/Dockerfile

dbrepo-metadata-service/api/pom.xml

dbrepo-metadata-service/entities/pom.xml

...t/tuwien/entities/database/table/columns/TableColumn.java

dbrepo-metadata-service/oai/pom.xml

dbrepo-metadata-service/pom.xml

dbrepo-metadata-service/querystore/pom.xml

dbrepo-metadata-service/report/pom.xml