This needs to be a PWA, it should cache the assets, work offline and be installable.

[AdaRoseCannon]

https://www.youtube.com/watch?v=n6-fEh5sB_g

[torgo]

May I offer you a fine https://www.pwabuilder.com ?

[AdaRoseCannon]

#6 fixes the manifest, (thanks @torgo) icons have also been added

Ideally a separate localised manifest should be generated for each language.

But that is an issue for when we have more than a single language.

[AdaRoseCannon]

This now has a minimal PWA which needs expanding and it generates inline URL encoded webapp manifests on the fly.

The PWA should be improved to cache responses to continue to work offline.