I don't quite get your answer..does that mean it's too easy or it's not worth the effort?
Basically yes, it is not worth the effort. You can setup apt to update automatically yourself quite trivially.
The same for Let's Encrypt.
Reskimming, I am not sure WTF he is doing with lighttpd I would need to look closer.
But the scripting of the backup to a third party site is going to be totally custom to every install. This is way too complex to setup in a simple script.
It works for him because everything is tied to the Google account.