add prod dirs

these 3 directories need to be in production (and writeable)
They were created by our rpm build process, but moving that here
to keep it in one place.

This is following suit for what we are doing to create the log directory

app/models/picture.rb

@@ -6,9 +6,8 @@ class Picture < ApplicationRecord
 
   virtual_has_one :image_href, :class_name => "String"
 
-  URL_ROOT          = Rails.root.join("public").to_s
-  DEFAULT_DIRECTORY = File.join(URL_ROOT, "pictures")
-  FileUtils.mkdir_p(DEFAULT_DIRECTORY)
+  URL_ROOT          = Rails.root.join("public").to_s.freeze
+  DEFAULT_DIRECTORY = File.join(URL_ROOT, "pictures").freeze
 
   def self.directory
     @directory || DEFAULT_DIRECTORY