Rails' built-in server binding default on 0.0.0.0 or different port

rails

#!/usr/bin/env ruby2.2
begin
  load File.expand_path("../spring", __FILE__)
rescue LoadError
end
APP_PATH = File.expand_path('../../config/application', __FILE__)
require_relative '../config/boot'

# START NEW CODE
require "rails/commands/server"
module Rails
  class Server
    def default_options
      super.merge({
        :Host        => '0.0.0.0',
        :Port        => 3000,
        :environment => (ENV['RAILS_ENV'] || "development").dup,
        :daemonize   => false,
        :debugger    => false,
        :pid         => File.expand_path("tmp/pids/server.pid"),
        :config      => File.expand_path("config.ru")            
      })
    end
  end
end
# END NEW CODE

require 'rails/commands'