I found this awesome PWA service:
You add a line of code to your
<head> section and this service does everything to make your app a PWA. And that’s free. Their business model is to charge a subscription fee if you want reports on how many people install your app and so on.
It’s the best PWA experience I’ve found so far. Highly recommended because figuring out how to make your app a PWA can be a lot of work.