Sveltekit 404 SSG template - rebuild strategy and new pages

[joepio]

Steps to replicate

• Build a site with Sveltekit template
• Use SSG and deploy
• Add a new page / route
• View the new page, get a 404

Why this happens

Sveltekit doesn't do hydration on 404 pages.

Solutions

Use a custom 404 page that renders FullPageResource

• let the client fetch the resource again

Have a rebuild button in Browser UI

• At the Site resource, for example, we add a link to the WebHook which the content editor can click after making some changes.
• Even better: if the user has made a new resource somewhere in the children of a Site, show a persistent notification that lets the user click to rebuild.