Make thumb image width and height become optional. Make more comments for config.

Author: ChenCatherine

src/config/lfm.php

@@ -75,7 +75,9 @@
     'max_image_size' => 50000,
     'max_file_size' => 50000,
 
+    // If true, the uploading file's mime type will be valid in valid_image_mimetypes/valid_file_mimetypes.
     'should_validate_mime' => false,
+    // If true, the uploading file's size will be verified for over than max_image_size/max_file_size.
     'should_validate_size' => false,
 
     // available since v1.3.0
@@ -97,6 +99,16 @@
         'text/plain',
     ],
 
+    /*
+    |--------------------------------------------------------------------------
+    | Image / Folder Setting
+    |--------------------------------------------------------------------------
+    */
+    
+    'thumb_img_width' => 200,
+    'thumb_img_height' => 200,
+
+
     /*
     |--------------------------------------------------------------------------
     | File Extension Information

src/controllers/UploadController.php

@@ -138,7 +138,7 @@ private function makeThumb($new_filename)
 
         // create thumb image
         Image::make(parent::getCurrentPath($new_filename))
-            ->fit(200, 200)
+            ->fit(config('thumb_img_width', 200), config('thumb_img_height', 200))
             ->save(parent::getThumbPath($new_filename));
     }