fix: completed serviceworker and registration logic

[mmrqa]

In preparation for the development of an openIMIS Offline-Mode I appended the incomplete example of CRA Service-Worker. Used the offical example from https://create-react-app.dev/docs/making-a-progressive-web-app/

This relates to the Bug https://openimis.atlassian.net/browse/OP-2552

Changed the registration of the serviceWorker to opt-in as otherwise all static content will be cached in the future.

[delcroip]

that looks interesting, do you think this will work with vite (in few weeks we should merge the vite-migration branch in dev)

[mmrqa]

that looks interesting, do you think this will work with vite (in few weeks we should merge the vite-migration branch in dev)

should also work with vite since both use the workbox library. For vite you need to add some more config afterwards (https://github.com/vite-pwa/create-pwa/blob/main/templates/template-react/vite.config.js)