Usage
Just do kirby x:down and your website is set in maintenance mode. You will be asked for an extra confirmation to make sure you really want to do this.
You can also pass an email address as a parameter to show in the maintenance message. This can be useful if you want to show a contact email address for support.
Email address
In the default snippet provided by the plugin it will always first check if $site->email() exists and if not it will use the email from the .maintenance file. If no email is configured it will show a generic message.