fix(#28): add note about undeploying yugabyte

yugabyte/README.md

@@ -12,4 +12,14 @@ For example, if experimenting with our sandbox cluster:
 
 1. Run the script `scripts/yugabyte-single-az.sh us-east-2 $NAMESPACE sandbox`
 2. check for connectivity `kubectl exec --namespace $NAMESPACE -it yb-tserver-0 -- /home/yugabyte/bin/ysqlsh -h yb-tserver-0.yb-tservers.$NAMESPACE`
-3. Optionally, create the gorm database `scripts/create-gorm-db.sh $NAMESPACE`
+3. Optionally, create the gorm database `scripts/create-gorm-db.sh $NAMESPACE`
+
+## Undeploying
+
+Note: Pvcs will not be deleted by default when uninstalling
+yugabyte with `helm uninstall yugabyte`.
+To delete them, you can run the following command:
+
+```bash
+kubectl delete pvc -l 'app in (yb-master,yb-tserver)'
+```