I have it running on a docker container. When I go to
http://dockerip:80 I get "forbidden" should a website be displayed? Or should I do anything els before Altui is displayed?

403 Forbidden
nginx/1.6.2
Edit... following the manual I get:
http://<YourIP>:3480/data_request?id=altui(this takes about one minute and requires, of course, an internet connection.) If you want
to watch it working you can tail the log with tail -f LuaUPnP.log
This should load a functional ALTUI interface which should run when you access the URL
http://<YourIP>:3480/data_request?id=lr_ALTUI_Handler&command=home#You will immediately be prompted to upgrade to the latest version (you don?t have to ?
again, it takes about a minute and will restart openLuup.) You should be able to exercise
all the ALTUI functionality through menus, etc., and simply see a single device (ALTUI) in
the system.
But I only see:
AltUI, amg0, Waiting Initial Data
and that never changes...