Announcing staging environment of TTN Back-end 1.0

I tried ttn on a private server (Docker-based deployment). It looks pretty good.
Thanks again to all involved!

Some remarks:

• For downlink and mqtt, use (for example):
  {"payload":"SGVsbG8gd29ybGQK","port":1,"ttl":"1h"}

If I use (from the wiki):
{ payload: 'SGVsbG8gd29ybGQK', port: 1, ttl: '1h' }
it doesn't work.

• If I "downlink" in using (for example) port 15 (or an other) my node (RN2483 based)
  always received on the port 1.

BR