AppManager: clean up UI

Change-Id: I8119ea81c80ff6165f4217dfdf9837e776703fc0
diff --git a/core/installer/tasks/dns.go b/core/installer/tasks/dns.go
index 51b066a..1316dc0 100644
--- a/core/installer/tasks/dns.go
+++ b/core/installer/tasks/dns.go
@@ -46,7 +46,7 @@
 			if err != nil {
 				return err
 			}
-			instanceId := app.Name()
+			instanceId := app.Slug()
 			appDir := fmt.Sprintf("/apps/%s", instanceId)
 			namespace := fmt.Sprintf("%s%s", env.NamespacePrefix, app.Namespace())
 			if err := st.appManager.Install(app, instanceId, appDir, namespace, map[string]any{