[SEBA-332] Adding instructions to deploy voltha-onos

Change-Id: I8c5dacd86f65aa0a3be0763b1767f592b2e428db
diff --git a/charts/onos.md b/charts/onos.md
index 447380a..942f1c0 100644
--- a/charts/onos.md
+++ b/charts/onos.md
@@ -24,6 +24,21 @@
 * REST/UI: 30120
 * Karaf debugger: 30555
 
+## Use VOLTHA-ONOS
+
+_This is intendend for development purposes_
+
+```shell
+helm install -n onos -f configs/onos-voltha.yaml onos
+```
+
+**Nodeports exposed**
+
+* OpenFlow: 31653
+* SSH: 30115
+* REST/UI: 30120
+* Karaf debugger: 30555
+
 ## Generic ONOS
 
 ```shell