How do we build and run it?
mvn clean test spring-boot:run
Running version in openshift:
http://artistalbum-crafti.e4ff.pro-eu-west-1.openshiftapps.com

In that case, what and why?
I used some framework in simpleast way(like Slf4j) and also used a 3'd party api (coverartarchive-api)
also most of the functions I used are inside spring-boot.

I used discogs, it seems it has description for most of artist and has it in json format.

I used caching system to make the service faster.it is in-memory caching and used a Cron-job running every Saturday to clear the cache(depending the system load and our esource it could be evry night or ...)
A monitoring framework also used to monitor the api calls and monitory where we have most heavy-load , monitoring will give more clear vision and solution to improve our service.
monitoring tools could be find in the /monitoring url from the baseUrl.

Two test case provided that will help to understand how the service works.