[x] install to home screen [ ] multi-language support [ ] add minimal responsive design [x] content overview page [ ] navigate to content pages [x] pre-load and cache resources [x] use camera for QR codes [ ] navigate through numbers/codes
- check PWA from Android studio via proxy at 10.0.2.2
- start the server with '-c-1' to disable default browser cache
- service worker sits in /public to have the widest possible scope
- first cache the app shell, then cache dynamic content on demand