annotations for amf dns name

Change-Id: I6fc652d01934beef424ffd144c86099d02152584
diff --git a/5g-control-plane/templates/service-amf.yaml b/5g-control-plane/templates/service-amf.yaml
index 5df3447..068d706 100644
--- a/5g-control-plane/templates/service-amf.yaml
+++ b/5g-control-plane/templates/service-amf.yaml
@@ -12,6 +12,8 @@
   name: amf
   labels:
 {{ tuple "amf" . | include "5g-control-plane.metadata_labels" | indent 4 }}
+  annotations:
+    external-dns.beta.kubernetes.io/hostname: {{ .Values.config.amf.serviceAnnotations.amfFqdn }}
 spec:
   type: {{ .Values.config.amf.serviceType }}
 {{- if .Values.config.amf.ngapp.externalIp }}