Use nip.io instead of xip.io for jupyter domain suggestion

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/assets/javascripts/clusters/stores/clusters_store.js

@@ -95,7 +95,7 @@ export default class ClusterStore {
         this.state.applications.jupyter.hostname =
           serverAppEntry.hostname ||
           (this.state.applications.ingress.externalIp
-            ? `jupyter.${this.state.applications.ingress.externalIp}.xip.io`
+            ? `jupyter.${this.state.applications.ingress.externalIp}.nip.io`
             : '');
       }
     });

spec/javascripts/clusters/stores/clusters_store_spec.js

@@ -110,7 +110,7 @@ describe('Clusters Store', () => {
 
       expect(
         store.state.applications.jupyter.hostname,
-      ).toEqual(`jupyter.${store.state.applications.ingress.externalIp}.xip.io`);
+      ).toEqual(`jupyter.${store.state.applications.ingress.externalIp}.nip.io`);
     });
   });
 });