diff --git a/custom/conf/app.ini b/custom/conf/app.ini
new file mode 100644
index 0000000000000..6007064690fb6
--- /dev/null
+++ b/custom/conf/app.ini
@@ -0,0 +1,4 @@
+[Ui]
+; THEMES=auto,gitea-auto,arc-green,gitea
+; DEFAULT_THEME=gitea-auto
+