add docker spring profile, mysql adapter + docker compose

src/main/resources/application-docker.properties

@@ -0,0 +1,14 @@
+application.name=gruppen2
+
+logging.pattern.console=[${application.name}],%magenta(%-5level), %d{dd-MM-yyyy HH:mm:ss.SSS}, %highlight(%msg),%thread,%logger.%M%n
+
+spring.datasource.initialization-mode=always
+spring.datasource.url=jdbc:mysql://dbmysql:3306/gruppen2
+spring.datasource.username=root
+spring.datasource.password=geheim
+
+keycloak.principal-attribute=preferred_username
+keycloak.auth-server-url=https://keycloak.cs.hhu.de/auth
+keycloak.realm=MOPS
+keycloak.resource=demo
+keycloak.public-client=true