Iceland card pictures are pictures of the front instead of the back

Routing works as expected but the url looks ugly

world-though-postcards/#/canada at the end of the url works but when clicking on the link, the end of the url changes to /world-through-postcards/#/world-through-postcards/canada which also works, but is ugly.

Downloading the page the Android gives the 404 error page from GitHub pages when loading the page, this is probably an issue in the manifest.json file.

Routing works when the page is loaded but not on first load. It only works on first load if there's no path provided.

WORKS
https://ncaron.github.io/world-through-postcards/

DOESN'T WORK -- Gets GitHub 404 page
https://ncaron.github.io/world-through-postcards/about

The beating heart icon does not work on Chrome mobile.