replace easily SpringBoot with Javalin

rename AppConfig and Properties to better match the purpose

use a random port

move the routing to the run application context

extract properties from AppConfig to avoid accessing the config inter…

…nalities (law of demeter)

move the port configuration to the Main Application EntryPoint

remove @component annotation from the controller

Uses the instantiated appConfig to retrieve the controller dependencies

pass only the property needed by the service

new app instance foreach test

decouple test from implementation using an http client