expose prometheus node port

Change-Id: I05698ee1dc89bca5f5925807a7b66c8ed0a7a375
diff --git a/bess-upf/values.yaml b/bess-upf/values.yaml
index a40df91..fb10022 100644
--- a/bess-upf/values.yaml
+++ b/bess-upf/values.yaml
@@ -59,6 +59,10 @@
   upf:
     # Enable privileged when run from VM with sriov support
     privileged: false
+    prometheus:
+      port: 8080
+      # Provide nodePort when serviceType is NodePort
+      #nodePort: 30088
     hugepage:
       enabled: true
     sriov: