[Suggestion] Don't use external CDN

[Falci]

The dashboard loads resources from external servers, like getumbrel.github.io:

umbrel-dashboard/src/views/AppStore.vue

Lines 55 to 60 in 8b875dc

	<img
	v-for="image in app.gallery"
	class="d-none"
	:key="app.id + image"
	:src="`https://getumbrel.github.io/umbrel-apps-gallery/${app.id}/${image}`"
	/>

I believe we could improve the users privacy if we load the images from the local instance.
I didn't check for other resources/servers

[gavinowens]

+1

[gavinowens]

Actually, I think this is so that app developers can update their apps on demand.