Gracefully handle the case where an installation is gone

Add timeout for GitHub API

Fix private URLs after previous commit

Forcibly list even 1 artifact when coming from the main page

Fix dark mode background

Safeguard against GitHub omitting the whole array in the response

Fix redirects from GitHub URLs that contain Unicode

Fixes #24

Fix redirecting from the dashboard to a private repo link

Fixes #18

Broken in 0e3b915

Fix flaky test

Update shards