Public folder not serving files

Hi!

I tried making file upload working in Lumen, but I have some problems with the public storage.

I set up filesystems (local and public), and created a symlink in public/storage which points to storage/app/public. If I created a file in storage/app/public then I cannot get it from http://mydomain.com/a.txt, assets/a.txt or storage/a.txt or anything. It looks like the url got passed to the router, and my API wants to handle the request.