feat(#27): Set up consola logger, make use of log levels in backend and frontend

deployment/docker-compose-prod.yaml

@@ -13,6 +13,8 @@ services:
     container_name: legalconsenthub-backend
     restart: on-failure:2
     environment:
+      LOGGING_LEVEL_ROOT: ${LOGGING_LEVEL_ROOT:-WARN}
+      LOGGING_LEVEL_APP: ${LOGGING_LEVEL_APP:-WARN}
       LEGALCONSENTHUB_DB_URL: jdbc:postgresql://legalconsenthub-db:5432/${LEGALCONSENTHUB_POSTGRES_DB}
       LEGALCONSENTHUB_DB_APP_USER: ${LEGALCONSENTHUB_POSTGRES_USER}
       LEGALCONSENTHUB_DB_PASSWORD: ${LEGALCONSENTHUB_POSTGRES_PASSWORD}