Enable debug logging in keycloak

Sources:
- https://www.keycloak.org/server/all-config#category-logging
- https://www.keycloak.org/server/logging
- Tested by adding the environment variable to the local docker-compose and saw the detailed logs.
- Can successfully build the Dockerfile_keycloak image successfully

Dockerfile_keycloak

@@ -1,7 +1,7 @@
 FROM quay.io/keycloak/keycloak:24.0.0
 
 ENV KC_TRANSACTION_XA_ENABLED 'false'
-
+ENV KC_LOG_LEVEL DEBUG
 
 COPY keycloak/realm/realm-export.json /opt/keycloak/data/import/realm-export.json
 COPY keycloak/themes /opt/keycloak/themes