NanoWeb is a PHP-based web server, and much lighter in its memory footprint than something like Apache.
However, after following the general instructions will be necessary to modify the conf/local.php file, as DokuWiki does not automatically detect its web server location (URL).
So if your DokuWiki installation is accessable from http://yourserver.com/dokuwiki/ put the following into your local.php:
$conf['basedir'] = '/dokuwiki/'; //a trailing slash is required