Just exposing a folder in the disk to users

I understand that every user has his own library, and those can be shared among users etc
but, can I create some kind of library that just shows all the contents of a folder in the disk?
So that I can basically have a web UI access to my files, and expose them with shared links if desired etc?

data has to be synced to the Seafile library on the server to be able to share it.

You could sync an existing folder to a new Seafile library and create share links within that library.