Set testing notify url,

Heres the patch

When I test payment gateways (and I work with them very often) I do one of 2 things:
- disable webhooks completely - this is when I test everything except for the webhook itself, or the payment gateway's reaction to the webhook
- enable webhooks - and setup tunneling app such as ngrok or cloudflared to expose my local machine to the internet, specifically for the sake of receiving webhooks from Easy.

I am still not sure what is the advantage of keeping webhooks enabled but sending them to some explicitly provided URL. Could you elaborate on this a bit? Seems to me like the second point above already addresses your needs.

Actually a good point, have looked into cloudflared as well, and ofcourse thats a solution. thank you