ninja: try more_set_headers

basic/apps/ninja/invoiceninja-values-configmap.yaml

@@ -15,7 +15,7 @@ data:
       certManager: true
       annotations:
         nginx.ingress.kubernetes.io/configuration-snippet: |
-          add_header "Content-Security-Policy: frame-ancestors 'self' ${nextcloud_domain}";
+          more_set_headers "Content-Security-Policy: frame-ancestors 'self' ${nextcloud_domain}";
     persistence:
       public:
         existingClaim: invoiceninja-data

basic/infrastructure/kustomizations/invoiceninja-customization.yaml

@@ -24,3 +24,5 @@ spec:
         optional: true
       - kind: Secret
         name: stackspin-cluster-variables
+      - kind: ConfigMap
+        name: stackspin-nextcloud-kustomization-variables