Add backube helm repo.

kubernetes/flux/repositories/helm/backube.yaml

@@ -0,0 +1,11 @@
+---
+# yaml-language-server: $schema=https://raw.githubusercontent.com/fluxcd-community/flux2-schemas/main/helmrepository-source-v1beta2.json
+apiVersion: source.toolkit.fluxcd.io/v1beta2
+kind: HelmRepository
+metadata:
+  name: backube
+  namespace: flux-system
+spec:
+  interval: 30m
+  url: https://backube.github.io/helm-charts/
+  timeout: 3m

kubernetes/flux/repositories/helm/kustomization.yaml

@@ -4,6 +4,7 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
  - authentik.yaml
+ - backube.yaml
  - bitnami.yaml
  - bjw-s.yaml
  - cilium.yaml