fix(nginx): Set default backend to custom-error-pages

values/ingress-nginx/values/ingress-nginx.yaml.gotmpl

@@ -113,6 +113,20 @@ controller:
 defaultBackend:
   enabled: true
 
+  image:
+    registry: registry.k8s.io
+    image: ingress-nginx/custom-error-pages
+    ## for backwards compatibility consider setting the full image url via the repository value below
+    ## use *either* current default registry/image or repository format or installing chart by providing the values.yaml will fail
+    ## repository:
+    tag: "v1.2.5"
+    pullPolicy: IfNotPresent
+    # nobody user -> uid 65534
+    runAsUser: 65534
+    runAsNonRoot: true
+    readOnlyRootFilesystem: true
+    allowPrivilegeEscalation: false
+
   tolerations:
    - key: unschedulable
      operator: Exists