feat(flux): Add Flux Kustomization and HelmRepository for nginx

Author: TheMeinerLP

clusters/feather-core/sources.yaml

@@ -0,0 +1,19 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: sources
+  namespace: flux-system
+spec:
+  interval: 1h
+  retryInterval: 1m
+  timeout: 5m
+  sourceRef:
+    kind: GitRepository
+    name: flux-system
+  path: ./infrastructure/clusters/feather-core/sources
+  prune: true
+  wait: true
+  decryption:
+    provider: sops
+    secretRef:
+      name: sops-gpg

infrastructure/clusters/feather-core/sources/kustomization.yaml

@@ -0,0 +1,5 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: flux-system
+resources:
+  - nginx.yml

infrastructure/clusters/feather-core/sources/nginx.yml

@@ -0,0 +1,8 @@
+apiVersion: source.toolkit.fluxcd.io/v1beta2
+kind: HelmRepository
+metadata:
+  name: nginx
+  namespace: flux-system
+spec:
+  interval: 5m
+  url: https://kubernetes.github.io/ingress-nginx