just involving

[nort3x]

deleted mongo-db from classpath cause no one is using it (yet?)
intention: avoiding usage of HashMap and static calls to Application.java

added application.yaml for H2 configuration mainly as an example
added application.properties for predefined and not hardcoded constants app might use

moved CSVParser from Application.java to CSVParser.java as a CommandLinerRunner

other changes are made accordingly (because of Db replacement)

[nort3x]

i'm yet just involving in this project, i added H2 because it provides a good visual H2-Console and it's fully in-memory without any need for third parties, i refactored mostly and used some spring-specific features for being a good example