support authentication?

[liuyl1992]

support authentication?

[viceice]

We need this too, because we would like to open it for external access

[jsiedentop]

As i already mentioned in the baget repo, private feeds could be easily reached with a reverse proxy like nginx. I think this would be a good solution for now. In this issue i descriped my solution, could be useful for others: loic-sharma/BaGet#515