docs: update README of helm-example

code-examples/helm-kafka-example/README.md

@@ -33,10 +33,36 @@ $ oc apply -f ./rhoas-secrets.yaml
 $ oc apply -f ./rhoas-services.yaml
 ```
 
-5. Deploy the helm chart setting the appropriate values:
-
+5. Deploy the Helm chart with the appropriate values:
+
+`helm install` command is used to install a chart to the OpenShift cluster.
+`Values` is a built-in object that provides access to values passed in the chart.
+
+The Helm chart uses the follwing values in the templates:
+
+* `rhoas.config` - Name of the ConfigMap object containing configurations deployed in the OpenShift cluster
+* `rhoas.secret` - Name of the Secret object containing service-account credentials deployed in the OpenShift cluster
+
+
+
+There are various ways to provide values:
+
+* The default method is specifying values in the `values.yaml` file. An example is shown below:
+
 ```
-$ helm install . --generate-name --set-string rhoas.config=<configmap-name>,rhoas.secret=<secret-name>
+## Example values.yaml file
+rhoas: 
+   config: my-service-context-configuration
+   secret: service-account-credentials
 ```
 
+* Specifying a YAML file of another name using the the --values flag:
+    ```
+    helm install . --generate-name --values my-values.yaml
+    ```
+* Passing values directly from the command line using the `--set-string` flag:
+    ```
+    helm install . --generate-name --set-string rhoas.config=my-context-3-configuration
+    ```
+
 To see how to use this code example follow the [guide](../../docs/rhoas/rhoas-helm-guide/).