def suffix
      suffix = ENV['LONO_SUFFIX'] # highest precedence
      suffix ||= Cfn::Current.suffix
      unless suffix
        settings = Setting.new.data
        suffix ||= settings["stack_name_suffix"] # lowest precedence
      end

      return if suffix&.empty?
      suffix
    end
def suffix
      suffix = ENV['LONO_SUFFIX'] # highest precedence
      suffix ||= Cfn::Current.suffix
      unless suffix
        settings = Setting.new.data
        suffix ||= settings["stack_name_suffix"] # lowest precedence
      end

      return if suffix&.empty?
      suffix
    end
Precedence (highest to lowest)
   1. LONO_SUFFIX
   2. .current/lono
   3. config/settings.yml