Add offline support #44
Description
my.vibe.camp has a PWA manifest, and can be "installed" as an app icon on a phone. However, it doesn't really actually work offline.
Since reception can be spotty at the campgrounds, it would be awesome if the app worked offline (and synced when it regained connection) using Service Workers. Functionality like:
- Viewing and scanning tickets without a connection
- Viewing the event schedule without a connection
- Any other information that could be cached in the future (eg an FAQ system, emergency info, site map, etc)
In addition to getting the core functionality working, the UI will need to display online/offline status, allow manual refreshing of data, etc.