What I meant is a bit different usecase. It is to be able to spread an app (PWA), after its hosting site is down.

But probably the easiest way is to open source it, and then even if it is taken down, anyone else can host it. 

 It should work the same. 

 But this requires my instance to be running, right?

I wanted this to work without any hosted instance.

 

 Yeah. There might be some ways to ger around this with pear, but I don't fully understand it yet.