Fix GH action (again)

Split and move auth into a separate package (andreimarcu#224)

* Split and move auth into a separate package

This change will make it easier to implement additional authentication
methods, such as OpenID Connect. For now, only the existing "apikeys"
authentication method is supported.

* Use absolute site prefix to prevent redirect loop

Switch to a more comprehensive mimetype detection library (andreimarc…

…u#231)

Display pages: Add OpenGraph tags for media

Cleanup: Integrate expired files periodic cleanup

Torrent: Ranged requests so torrents work

README: Update screenshots

Dockerfile: Update to 1.14

Travis: Update to 1.14

Basic auth: fix for using different paths