asterisk: allow prometheus in network policy

asterisk/network-policies.yml

@@ -11,6 +11,13 @@ spec:
     - Ingress
     - Egress
   ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: monitoring
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: prometheus
     - from:
         - ipBlock:
             cidr: 100.101.0.0/16