We need to update the Documentation in https://github.com/flyimg/flyimg/blob/master/docs/url-options.md
Fix the images url.
App full options need to be updated as well.

If you don't append a cache, a Cache\Memory will be used implicitly.

This is wrong. It has been changed in the flysystem. See thephpleague/flysystem#368

Whenever I use this middleware when combined with the sink option empty files are written:

$client->get($uri, ['sink' => "$dir/$uri"]);

The file $dir/$uri is created but has no content.

In the following lines, we check if the visibility has been specified, and if it hasn't we default to private. https://github.com/Superbalist/flysystem-google-cloud-storage/blob/master/src/GoogleStorageAdapter.php#L143-L149

Is there any reason we need to default to anything at all? If we specify nothing, the default object ACL of the bucket should be applied (by default private, visible to owne

Usage
Yii::$app->fs->write('filename.ext', 'contents');

Error - Configs
Invalid Configuration – yii\base\InvalidConfigException
The "app" property must be set.

        'fs' => [
            'class' => 'dosamigos\flysystem\DropboxFsComponent',
            'token' => 'token',
        ],

TypeError
Argument 2 passed to Spatie\Dropbox\Client::__construct() must