Improve the documentation (#44)

* Create network.md

* Update configuration.md

* Update network.md

* Update network.md

Documentation/network.md

@@ -0,0 +1,58 @@
+# Network
+
+HassOS use NetworkManager to control the host network. You can setup the network configuartion in future over the API/UI.
+Actual we support only manual configuration with NetworkManager connection files. Without a configuration, we run default as
+DHCP device.
+
+## Configuration Examples
+
+You can look also into [Official Manual][keyfile] or there are a lot of examples accross internet.
+
+### LAN
+```ini
+[connection]
+id=hassos-network
+type=ethernet
+
+[ipv4]
+method=auto
+
+[ipv6]
+addr-gen-mode=stable-privacy
+method=auto
+```
+
+### Wireless WPA/PSK
+```ini
+[connection]
+id=hassos-network
+type=wifi
+
+[wifi]
+mode=infrastructure
+ssid=MY_SSID
+
+[wifi-security]
+auth-alg=open
+key-mgmt=wpa-psk
+psk=MY_WLAN_SECRED_KEY
+
+[ipv4]
+method=auto
+
+[ipv6]
+addr-gen-mode=stable-privacy
+method=auto
+```
+
+### Static IP
+
+Replace follow configs:
+```ini
+[ipv4]
+method=manual
+address1=192.168.1.111/24,192.168.1.1
+dns=8.8.8.8;8.8.4.4;
+```
+
+[keyfile]: https://developer.gnome.org/NetworkManager/stable/nm-settings.html