bug fix

app/Http/Controllers/Api/HomePageController.php

     {
         $locale = $locale == "tw" ? "zh_TW" : $locale;
         $result = [];
-        $banners = Banner::where("visible", true)->get()->map(function ($record) use ($result, $locale){
+        $banners = Banner::where("visible", true)->get()->map(function ($record) use (&$result, $locale){
             $result[] = [
                 "imgUrl" => $record->imgUrlLink,
                 "mobileImgUrl" => $record->mobileImgLink,
                 "content" => $record->getTranslation("content", $locale),
             ];
         });
+        return Response::ok($result);
     }
 
     public function list($locale = 'tw')