    # File lib/rack/server.rb, line 193
        def default_options
          environment  = ENV['RACK_ENV'] || 'development'
          default_host = environment == 'development' ? 'localhost' : '0.0.0.0'

          {
            :environment => environment,
            :pid         => nil,
            :Port        => 9292,
            :Host        => default_host,
            :AccessLog   => [],
            :config      => "config.ru"
          }
        end