I've just updated the app. Now users who are signed in can add new artists, new albums and new songs, even if they are not admins.
You're right, I guess I should remove the issues section. I just need to find what I would put on the homepage instead. Maybe a feed of the latest songs in the database?
Edit: I've removed the issues section. As you can see on http://www.kopibibli.org/, the homepage now displays the latest songs that were added to the database.