cluster/kube/metallb: parametrize address pools
diff --git a/cluster/kube/cluster.jsonnet b/cluster/kube/cluster.jsonnet
index 800e47a..2f6da45 100644
--- a/cluster/kube/cluster.jsonnet
+++ b/cluster/kube/cluster.jsonnet
@@ -51,7 +51,13 @@
     // Metrics Server
     metrics: metrics.Environment {},
     // Metal Load Balancer
-    metallb: metallb.Environment {},
+    metallb: metallb.Environment {
+        cfg+: {
+            addressPools: [
+                { name: "public-v4-1", protocol: "layer2", addresses: ["185.236.240.50-185.236.240.63"] },
+            ],
+        },
+    },
     // Main nginx Ingress Controller
     nginx: nginx.Environment {},
 };