Rails5 Cameleon CMS - 如何定义默认站点

Question

我关注doc

Start your server

rails server # and then go to your browser http://localhost:3000/

服务器运行并向我显示gui。但控制台说：

Camaleon CMS - Please define your current site: 
$current_site = CamaleonCms::Site.first.decorate 
or map your domains: 
http://camaleon.tuzitio.com/documentation/category/139779-examples/how.html

不确定在哪里配置（哪个文件？） 我试过了this

# Add an initializer in config/initializers/camaleon_map_sites.rb
Rails.application.config.to_prepare do
  CamaleonCms::SiteHelper.module_eval do
    def cama_current_site_helper(args)
      if !args[:site].present? && request.present?
        args[:site] =
          CamaleonCms::Site.find_by_slug('localhost:3000').decorate
      end
    end
  end
end

..没有成功。有什么想法吗？