I put together some quick notes on how I set up a self-hosted instance of ntfy.sh and started using it for easy push notifications from my various servers and other systems.
I'm really impressed by how easy it was to configure and how well and reliably it works. I'll definitely be setting up a gratuitous number of notification hooks for everything I can think of now.
https://runtimeterror.dev/easy-push-notifications-with-ntfy/