Hi Jakub
The OAM server has been down for quite a while. I'm not sure
there are any plans to bring it back up.
Running your own (public) server is actually a big deal. It
requires money, time, lots of attention, and probably more time
and money to keep it up. It's lots of fun for a once-off
project but is quite another thing month after month, year after
year.
But please don't let me discourage you. Another approach would
be to set up a private server on your local PC and upload the
finished product (slippy maps, airspace geo-data etc) to a
public website. There's no community aspect, but at least your
data's out in the world.
I feel like a discussion on a community way forward is
necessary.
//Glen