We now use Marianne font from @gouvfr-lasuite/ui-kit
package instead of a versionned local copies.
This ensures we always use the latest version of
the font.
During a build or dev command, Marianne font files
are copied from node_modules to the public assets
folder. They can stop being versionned.
Add a offline mode support from a service worker.
The service worker will cache the assets and the
visited pages to be able to work offline.
Created a fallback page for when the user is offline
and tries to access a page that is not cached.