Change default host:port bindings for rails app. Add the following lines to the file config/boot.rb

boot.rb

# add following to file config/boot.rb to change default host:port bindings

require 'rails/commands/server'

module Rails
  class Server
    alias :default_options_alias :default_options
    def default_options
      default_options_alias.merge!(Host: '127.0.0.1', Port: 3333)
    end    
  end
end