Adding option to expose the etcd-cluster as a nodePort

Change-Id: Icd362e1d89ece204eafd0bf212127431a5219f47
diff --git a/etcd-cluster/values.yaml b/etcd-cluster/values.yaml
index ac3ae31..9bbab01 100644
--- a/etcd-cluster/values.yaml
+++ b/etcd-cluster/values.yaml
@@ -21,6 +21,10 @@
 memoryLimit: 1024Mi
 autoCompactionRetention: "12"
 
+# expose the etcd-cluster as a nodePort
+# etcdNodePort: 32379
+etcdNodePort: ""
+
 images:
   etcd:
     repository: "quay.io/coreos/etcd"