diff --git a/backend/url-shortener/config/config.php b/backend/url-shortener/config/config.php
new file mode 100644
index 0000000..0645030
--- /dev/null
+++ b/backend/url-shortener/config/config.php
@@ -0,0 +1,20 @@
+<?php
+/**
+ * URL shortener — BE config (copy to config.php on Alpine).
+ * DB user: reuse crash reporter app user (same password as androidcast_crashes in crashes config.php).
+ */
+return [
+    'db' => [
+        'driver' => 'mysql',
+        'mysql' => [
+            'host' => '127.0.0.1',
+            'port' => 3306,
+            'socket' => '/run/mysqld.sock',
+            'database' => 'url_shortener',
+            'username' => 'androidcast',
+            'password' => 'androidcastrootowned',
+            'charset' => 'utf8mb4',
+        ],
+    ],
+    'public_base' => 'https://s.f0xx.org',
+];