Change application.properties:
If you want to use in-memory storage, specify the corresponding profile: use_db_storage OR use_mem_storage
If you use in-memory storage, specify it size: storage.memory.size. It is a number of objects (multiply 2),
that will save in the storage. The database is H2.
Run:
$ mvn clean install
$ mvn spring-boot:run
Swagger: http://localhost:8080/swagger-ui.html
In-memory storage contains eden and longterm maps. The first is structure, which keeps "new" objects.
When it becomes full, the whole data move to a long-term data structure.