added prodution note to readme

cluster/addons/fluentd-elasticsearch/README.md

@@ -15,7 +15,7 @@ information.
 ## Elasticsearch
 
 Elasticsearch is deployed as a [StatefulSet][statefulSet], which is like
-a Deployment, but allows for maintaining state on storage volumes. 
+a Deployment, but allows for maintaining state on storage volumes.
 
 ### Security
 
@@ -89,3 +89,19 @@ avoid Fluentd pods scheduling there.
 [k8sElasticsearchDocs]: https://kubernetes.io/docs/tasks/debug-application-cluster/logging-elasticsearch-kibana
 
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+
+## Running EFK stack in production
+
+The configurations provided here, for Elasticsearch, Fluentd & Kibana (EFK),
+are a starting point and should not be considered to be production ready.
+
+If you like to run these tools in a production environment you could use the
+[Helm](https://helm.sh) charts, provided by the Helm community, which are used
+by a lot of people and therefore a widely tested. You can find them all via the
+[Helm Hub](https://hub.helm.sh/).
+
+The source of the mentioned charts can be found here:
+
+* [Elasticsearch](https://github.com/helm/charts/tree/master/stable/elasticsearch)
+* [Fluentd-elasticsearch](https://github.com/kiwigrid/helm-charts/tree/master/charts/fluentd-elasticsearch)
+* [Kibana](https://github.com/helm/charts/tree/master/stable/kibana)