Interactive documentation by Swagger is on http://localhost:8080/swagger-ui.html after starting server by ./gradlew bootRun.
But there is a bug and Swagger does not work with Spring boor 2 data rest. So only non repository endpoints are there.
Another documentation is generated by spring-restdocs: ./gradlew asciidoctor && xdg-open build/docs/html5/api-guide.html
This documentation is generated at test phase so what is called in tests it is documented.
Due to time limits I implemented only several tests as an example. Other tests should by very similar. So only repository endpoints which are not covered by Swagger are tested and documented this way.