adding example for hardened linux clusters based on example

hardened/README.md

@@ -0,0 +1,16 @@
+# Hardened Example
+
+This example will deploy the [Kubernetes sample guestbook](https://github.com/kubernetes/examples/tree/master/guestbook/) application, with modifications to securityContext which allow its deployment on a hardened cluster. 
+The app will be deployed into the `default` namespace. Note that you must have added the `default` namespace to the PSA to allow deployments to this namespace. 
+
+```yaml
+kind: GitRepo
+apiVersion: fleet.cattle.io/v1alpha1
+metadata:
+  name: simple
+  namespace: fleet-local
+spec:
+  repo: https://github.com/rancher/fleet-examples
+  paths:
+  - hardened
+```