Merge pull request #1649 from pixelfed/trwnh-image-driver

read IMAGE_DRIVER from env ('gd' or 'imagick')

config/image.php

@@ -15,6 +15,6 @@ return [
     |
     */
 
-    'driver' => 'gd',
+    'driver' => env('IMAGE_DRIVER', 'gd'),
 
 ];