#TODO
Features that still need to be added or are nice to have.

* Use GWID and GWKEY to fetch the gateway's configuration from the TTN account server. The result should contain a link to the correct global_conf.json for the gateway's region. Also the antenna gain, router address, location. Use these to write an appropriate local_conf.json.

* Add ability to enable/disable TTN by environment variable. Default enabled.

* Ability to add up to 3 additional servers using environment variables. 
  * Server type (deffault semtech)
  * Server hostname/ip (default log.gatewaystats.org)
  * server port (default 1700)
  * downlink enabled (default off)