Merge branch 'master' into dev

.docs/docker/_header.md

.docs/examples/covid19.md

.docs/examples/hazard.md

.docs/examples/transportation.md

.docs/images/screenshots/transportation-dashboard.png

.docs/redirect.html

.gitlab-ci.yml

CONTRIBUTING.md

Makefile

docker-compose.yml

mkdocs.yml

tmp/.gitignore

tmp/Dockerfile

tmp/README.md

tmp/api/pom.xml

tmp/api/src/main/java/at/tuwien/ExportResourceDto.java

tmp/api/src/main/java/at/tuwien/api/SortTypeDto.java

...i/src/main/java/at/tuwien/api/amqp/ChannelDetailsDto.java

tmp/api/src/main/java/at/tuwien/api/amqp/ConsumerDto.java

...i/src/main/java/at/tuwien/api/amqp/CreateExchangeDto.java