Update README to reflect helm chart

README.md

 This installs a local storage provisioner to your kubernetes cluster.
 
-**NOTE:** Only use this on single node clusters! On multi-node clusters you will
-most probably run into troubles because the storage can not be moved from one
-node to the other!
+## Requirements
 
-To install:
+**NOTE:** Only use this on single-node clusters! On multi-node clusters you
+will most probably run into trouble because the storage can not be moved from
+one node to the other!
+
+## Configuration
+
+`values.yaml` contains all variables that are considered when installing the
+Helm chart.
+
+In particular, you may want to adapt `storageDirectory` to determine where
+data are stored.
+
+## Installation
 
 ```
-$ cd deploy                         # Enter deploy directory
-$ kubectl apply -f rbac.yaml        # Creates necessary RBAC rules (if your cluster is rbac-enabled)
-$ kubectl apply -f deployment.yaml  # Adds the local storage container to your cluster in the kube-system namespace
+helm install .
 ```
 
-Now you can automatically provision local storage volumes by using the
-`storageClassName`: `local` in your persistent volume claims.
+## Usage
+
+Once this provisioner is installed on your cluster, you can automatically
+provision local storage volumes by using the `storageClassName`: `local` in
+your persistent volume claims.