code: async def server_stop(app, loop):
      
      em = Embed(color=0xe67e22)
      em.set_footer('Host: {}'.format(socket.gethostname()))
      em.description = '[INFO] Server Stopped'
  
      await app.webhook.send(embed=em)
      await app.session.close()
docs: Sends a message to the webhook channel when server stops.