update menu import and export

config/application.rb

@@ -2,6 +2,8 @@ require_relative 'boot'
 
 require 'csv'
 require 'rails/all'
+require 'creek'
+# require 'iconv'
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.

config/initializers/mime_types.rb

@@ -3,3 +3,4 @@
 # Add new mime types for use in respond_to blocks:
 # Mime::Type.register "text/richtext", :rtf
 Mime::Type.register 'application/vnd.ms-excel', :xls
+Mime::Type.register "application/xlsx", :xlsx