Update readme for helm

Author: 0x7c13

README.md

@@ -79,16 +79,17 @@ Why do I need docker-gc for Kubernetes???
 
 - Kubernetes comes with built-in image and container GC, however, it only deals with the images/containers deployed by k8s but not the ones that get used/generated by containers which talk directly to host docker. Imagine you have a deployment of docker builders in Kubernetes which uses host docker to build stuff.
 
-An example of helm config:
-
- dockerEndpoint: unix:///var/run/docker.sock
- executionIntervalInMinutes: 60
- dockerClientTimeoutInSeconds: 180
- imageDeletionOrder: ByImageLastTouchDate
- strategy: ByDiskSpace
- sizeLimitInGigabyte: 100
- containerStateBlacklist: dead,exited
- 
+## How to install?
+
+Examples:
+```
+helm install --set config.strategy=ByDiskSpace --set config.sizeLimitInGigabyte=15 --set config.executionIntervalInMinutes=720 jackil-docker-gc
+```
+or
+```
+helm install --set config.strategy=ByDate --set config.daysBeforeDeletion=30 --set config.executionIntervalInMinutes=720 jackil-docker-gc
+```
+
 Note: When executionIntervalInMinutes set to -1, docker-gc will perform one-time cleanup.
 
 For custom configurations, please head to values.yaml.