bugfix: activated json logging for keycloak

- added '--log-console-output=json'

roles/keycloak/vars/main.yml

@@ -26,7 +26,7 @@ keycloak_docker: {
       image_name: "{{ keycloak_image }}",
       image_version: "{{ keycloak_version }}",
       labels: "{{ keycloak_labels + ( keycloak_labels_additional | default([])) }}",
-      command: "start",
+      command: "start --log-console-output=json",
       environment: [
         "KEYCLOAK_ADMIN: \"{{ keycloak_admin_username }}\"",
         "KEYCLOAK_ADMIN_PASSWORD: \"{{ keycloak_admin_password }}\"",