env: fix env key redirect
diff --git a/core/installer/welcome/env.go b/core/installer/welcome/env.go
index 2595028..10a2ade 100644
--- a/core/installer/welcome/env.go
+++ b/core/installer/welcome/env.go
@@ -329,5 +329,5 @@
 	s.tasks[key] = t
 	s.dns[key] = dns
 	go t.Start()
-	http.Redirect(w, r, fmt.Sprintf("/env/key", key), http.StatusSeeOther)
+	http.Redirect(w, r, fmt.Sprintf("/env/%s", key), http.StatusSeeOther)
 }