Change default_options for Rails::Server

boot.rb

# Override default options for server command
# This example changes default development host to 0.0.0.0
 
require 'rails/commands/server'
 
module Rails
  class Server
    new_defaults = Module.new do
      def default_options        
        default_host = Rails.env == 'development' ? '0.0.0.0' : '127.0.0.1'
        super.merge( Host: default_host )
      end
    end
 
    # Note: Module#prepend requires Ruby 2.0 or later
    prepend new_defaults
  end
end