docs: def preview():  # pragma: no coverage
      """launch an HTTP to preview the website"""
      Handler = http.server.SimpleHTTPRequestHandler
      socketserver.TCPServer.allow_reuse_address = True
      port = CONFIG['http_port']
      httpd = socketserver.TCPServer(("", port), Handler)
      os.chdir(CONFIG['output_to'])
      try:
          logger.info("and ready to test at "
                      "http://127.0.0.1:%d" % CONFIG['http_port'])
          logger.info("Hit Ctrl+C to exit")
          httpd.serve_forever()
      except KeyboardInterrupt:
          httpd.shutdown()