Exactly what I told my Phillipino mother in law to protect her AOL account. I can't imagine why she doesn't do it.

I'm not sure whether that's actually better than storing it on github (or any other professionally managed git instance). Sure, you gain some security by obscurity (because your VPS isn't a juicy target like github is), but that's about it. If the FBI is after you, they can send a letter to your VPS provider just like they can send a letter to github. I probably also expect github to do a better job at keeping their systems secure than an amateur sysadmin. In both cases the chance of getting hacked is fairly low, but the whole point of a password manager is that you don't have to rely on the storage service being secure to keep your passwords safe. If you need to rely on the storage service (eg. git server) to be not compromised for your passwords to be safe, then that kills a large benefit of using a password manager.