http {
  index index.html;

  server {
    server_name www.domain1.de;
    access_log logs/domain1.access.log main;

    root /var/www/seite1;
  }

  server {
    server_name www.domain2.de;
    access_log  logs/domain2.access.log main;

    root /var/www/seite2;
  }
}