Update README.md

README.md

@@ -692,8 +692,8 @@ service.
 `playbooks/kind-metallb.yml` boilerplate.
 
 :bulb: To go as quick as possible, please:
-  * provision a more powerful VM: 2 CPUs, 4GB RAM, 40GB root disk -- no extra
-    volume needed;
+  * provision a more powerful VM: **Debian 12 Bookworm** OS, 2 CPUs, 4GB RAM, 40GB root disk -- no extra
+    volume needed. :warning: Do not use Debian 11;
   * provision a 2-node KinD cluster with 2 http-echo pods on the only worker
     node;
   * use Ansible's [debugging