Add heimdall kustomization source

applications/heimdall/README.md

@@ -0,0 +1 @@
+flux create secret git heimdall-k8s-auth --url=ssh://git@github.com/thejimnicholson/heimdall-k8s.git --private-key-file=/home/jim/.ssh/id_rsa

applications/heimdall/heimdall-source.yaml

@@ -0,0 +1,14 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1beta1
+kind: GitRepository
+metadata:
+  name: heimdall
+  namespace: flux-system
+spec:
+  interval: 1m0s
+  ref:
+    branch: master
+  secretRef:
+    name: heimdall-k8s-auth
+  url: ssh://git@github.com/thejimnicholson/heimdall-k8s.git
+