Adding a dev-values.yaml to always pull master of images if used

Change-Id: I52fe9461a1b9be690c6f2e714b1d3a9d4dfb3170
diff --git a/README.md b/README.md
index 55aa771..9397f89 100644
--- a/README.md
+++ b/README.md
@@ -386,6 +386,23 @@
 
 > In order for this to work the `imagePullPolicy` has to be set to `Always`.
 
+### Develop with latest code
+
+The voltha-infra and voltha-stack charts pull the referenced version of every component, if your charts are up to date 
+that will be the latest released one.  
+If for your development and testing you'd like to have all the `master` of each component, independently if that has 
+been officially tagged and release there is a provided `dev-values.yaml`. You can use it for the a `voltha-stack` like so:
+```shell
+helm upgrade --install --create-namespace \
+  -n voltha1 voltha1 onf/voltha-stack \
+  --set global.stack_name=voltha1 \
+  --set voltha_infra_name=voltha-infra \
+  --set voltha_infra_namespace=infra \
+  -f examples/dev-values.yaml
+```
+After the feature you are working on is released by modifying the `VERSION` file and removing `-dev` you 
+can remove the `dev-values.yaml` file from your helm command. 
+
 ### Test changes to a chart
 
 If you are working on an helm chart you can install a stack omitting that component,
diff --git a/examples/dev-values.yaml b/examples/dev-values.yaml
new file mode 100644
index 0000000..ecb9a7d
--- /dev/null
+++ b/examples/dev-values.yaml
@@ -0,0 +1,22 @@
+---
+
+# Copyright 2020-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+global:
+  log_level: DEBUG
+  image_pullPolicy: Always
+  image_tag: master
+
+