add config support for image scale

themes/beauty/controller/SiteController.php

@@ -528,7 +528,8 @@ Class SiteController extends Controller {
 
                 $imagick->scaleImage($width, $height, true);        //生成缩略图，并自适应
                 $imagick->setImageFormat('jpeg');
-                $imagick->setImageCompressionQuality(90);
+                $quality = !empty(FSC::$app['config']['smallImageQuality']) ? FSC::$app['config']['smallImageQuality'] : 90;
+                $imagick->setImageCompressionQuality($quality);
                 $img_data = $imagick->getImageBlob();
                 $imagick->clear();