Do not use nodePortPrefix for external app

Change-Id: I77d085ca89d51e3a1ba102d7666ee419701c39e4
Issue-ID: CCSDK-366
Signed-off-by: Alexis de Talhouët <adetalhouet89@gmail.com>
diff --git a/kubernetes/contrib/charts/netbox/values.yaml b/kubernetes/contrib/charts/netbox/values.yaml
index 6665064..2dfb36b 100755
--- a/kubernetes/contrib/charts/netbox/values.yaml
+++ b/kubernetes/contrib/charts/netbox/values.yaml
@@ -16,7 +16,7 @@
 # Global configuration defaults.
 #################################################################
 global:
-  nodePortPrefix: 302
+  nodePortPrefixExt: 304
   commonConfigPrefix: netbox
   readinessRepository: oomk8s
   readinessImage: readiness-check:2.0.0