Thanks for sharing the bell. I'll take a look. If you want to try push notifications, I use https://pushover.net as a service.

I developed the tool myself, and it's at https://git.sr.ht/~bayindirh/nudge if you feel like checking it out.

If you want to host the whole push notification infrastructure, you can look at https://ntfy.sh which also can be integrated with cURL.