Single copy of Preambula can be used to serve multiple sites at same time. To use Preambula in multisite mode do following:
.htaccess and _handler.php from public_html to each created directoryDocumentRoot (in VirtualHost sections of Apache config file) or just root (in "server" blocks of nginx config)If you need specific config for one or more of this sites, copy config.php file to domain.name.config.php (i.e. domain1.example.com.config.php) and change the name of config file in _handler.php (string require __DIR__.'/../config.php';) in appropriate directory.