code: def run(cutouts, hostname="localhost", port=DEFAULT_PORT):
    
    def handler(*args):
      return ViewerServerHandler(cutouts, *args)
  
    myServer = HTTPServer((hostname, port), handler)
    print("Viewer server listening to http://{}:{}".format(hostname, port))
    try:
      myServer.serve_forever()
    except KeyboardInterrupt:
      # extra \n to prevent display of "^CContinuing"
      print("\nContinuing program execution...")
    finally:
      myServer.server_close()
docs: Start a local web app on the given port that lets you explore this cutout.