Add Velero and snapshot controller for backups

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

_includes/kubernetes-flux-namespace.md

@@ -0,0 +1,12 @@
+## Preparation
+
+### Namespace
+
+We need a namespace to deploy our HelmRelease and associated YAMLs into. Per the [flux design](/kubernetes/deployment/flux/), I create this example yaml in my flux repo at `/bootstrap/namespaces/namespace-{{ page.meta.helmrelease_namespace }}.yaml`:
+
+```yaml title="/bootstrap/namespaces/namespace-{{ page.meta.helmrelease_namespace }}.yaml"
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: {{ page.meta.helmrelease_namespace }}
+```