ActionDispatch monkey patch

show_exceptions-monkey-patch.rb

module ActionDispatch
  class ShowExceptions
    private
      # override public_path, because keeping static error pages in
      # <Rails.root>/public is, well, ridiculous, as they can be
      # statically accessed.  It's.  Just.  Wrong.
      def public_path
        "#{Rails.root}/config/errors"
      end
  end
end