code: function metaData(req, res, next) {
    var zlSite = res.locals.zlSite;
  
    // favicons
    if (zlSite.zsOptions && zlSite.zsOptions.favicons) {
      res.locals.favicons = zlSite.zsOptions.favicons;
    }
  
    // title
    res.locals.title = zlSite.zsName;
  
    // robots: default for seo (themes like Admin may set beforehand)
    if (!res.locals.robots) res.locals.robots = 'INDEX, FOLLOW';
    next();
  }
docs: setup meta data