lib/omnibus/packagers/deb.rb
def write_conffiles_file
      return if project.config_files.empty?

      render_template(resource_path("conffiles.erb"),
        destination: File.join(debian_dir, "conffiles"),
        variables: {
          config_files: project.config_files,
        }
      )
    end
def write_conffiles_file
      return if project.config_files.empty?

      render_template(resource_path("conffiles.erb"),
        destination: File.join(debian_dir, "conffiles"),
        variables: {
          config_files: project.config_files,
        }
      )
    end
Render the list of config files into the conffile.

 @return [void]