Refactor Nextcloud configuration: update environment variable keys, enhance Ingress annotations, and add database initialization job with kustomization support.

apps/nextcloud/init/kustomization.yaml

@@ -0,0 +1,13 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: nextcloud
+resources:
+  - db-init-job.yaml
+configMapGenerator:
+  - name: config
+    envs:
+      - ../config/config.env
+secretGenerator:
+  - name: secrets
+    envs:
+      - ../config/secrets.env