======Network Services for HOA======

  * [On Site and Internet] **https://elfen.hackenopenair.de** Help (aka. Angel-) Coordination
  * [On Site] **mqtt.hackenopenair.de** Open MQTT Broker
  * [On Site] Apt-Cacher NG **http://apt.hackenopenair.de:3142**
    * Option 1: ''echo -e 'Acquire::http { Proxy "http://apt.hackenopenair.de:3142"; }\nAcquire::https::proxy "DIRECT";' | sudo tee /etc/apt/apt.conf.d/hoa-proxy''
    * Option 2: ''apt install auto-apt-proxy'' (use http in your source.list to benefit from the cache)
    * Option 3: Use ''deb http://172.29.0.2:3142/debian stable main contrib non-free'' in your sources.list (also with other releases)