enable ingress and fix host setting

flux2/apps/zulip/zulip-values-configmap.yaml

@@ -11,13 +11,14 @@ data:
       tag: "f60b8cc"
 
     ingress:
+      enabled: true
       annotations:
         # Tell cert-manager to automatically get a TLS certificate
         kubernetes.io/tls-acme: "true"
       hosts:
-        - zulip.${domain}
+        - host: "zulip.${domain}"
           paths:
-            - path: /
+            - path: "/"
       tls:
         - hosts:
             - "zulip.${domain}"