[Enhancement] Service worker 

Update the service worker with a caching system with the [Service Worker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API) to make the [PWA](https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Guides/What_is_a_progressive_web_app) work offline and update the data when necessary.