How to implement Websocket for Quectel EC21

Hi, i want to implement webpage configuration and webpage OTA for Quectel EC21. Kindly show me a direction or any tutorial. Thanks in advance.

I have privately sent the file to you, please check it, thanks
Best wishes

we are also trying to implement a websocket for the EC21.
Dear FelixCheng-Q is said file publicly available?
If not could you please also send the mentioned file to me?

Best regards,