Update singbox.json for clash API

base/base/singbox.json

@@ -100,5 +100,12 @@
     "rules": [],
     "auto_detect_interface": true
   },
-    "experimental": {}
+  "experimental": {
+    "clash_api": {
+      "external_controller": "127.0.0.1:9090",
+      "external_ui": "dashboard",
+      "store_selected": true,
+      "store_fakeip": true
+    }
+  }
 }