Disable results volume in minimal configuration

helm/README.md

@@ -9,6 +9,8 @@ helm dependencies update .
 helm install theodolite .
 ```
 
+Additionally, a PersistentVolumeClaim with the name `theodolite-pv-claim` needs to be created or the results volume can be disabled as done with the minimal configuration, described below.
+
 ## Customize Installation
 
 As usual, the installation with Helm can be configured by passing a values YAML file:

helm/preconfigs/minimal.yaml

@@ -6,3 +6,7 @@ cp-helm-charts:
     brokers: 1
     configurationOverrides:
       offsets.topic.replication.factor: "1"
+
+operator:
+  resultsVolume:
+    enabled: false