public function delete($server_filename)
    {
        $upload_path = config('dropzoner.upload-path');

        $full_path = $upload_path . $server_filename;

        if (\File::exists($full_path)) {
            \File::delete($full_path);
        }

        event(new ImageWasDeleted($server_filename));

        return response()->json([
            'error' => false,
            'code'  => 200
        ], 200);
    }