Merge branch 'master' into release-v1.4

.docs/system-services-search.md

.docs/system-services-upload.md

.docs/usage-overview.md

.docs/usage-storage.md

.gitlab-ci.yml

.gitlab/branching-strategy.png

.java-stubs/.swagger-codegen/VERSION

.java-stubs/README.md

.java-stubs/docs/ApiErrorDto.md

.java-stubs/docs/ContainerBriefDto.md

.java-stubs/docs/ContainerChangeDto.md

.java-stubs/docs/ContainerCreateRequestDto.md

.java-stubs/docs/ContainerDto.md

.java-stubs/docs/ContainerEndpointApi.md

.java-stubs/docs/CreatorDto.md

.java-stubs/docs/DatabaseAccessDto.md

.java-stubs/docs/DatabaseDto.md

.java-stubs/docs/GrantedAuthorityDto.md

.java-stubs/docs/IdentifierDto.md

.java-stubs/docs/ImageBriefDto.md