Reorganize docs.

docs/Platforms/FOSS/Android/Android.md

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+### Running Wekan server at Android
+
+Requirements:
+- arm64 or x64 Android with at least 3 GB RAM. Tested with with arm64 OnePlus 3 that has 6 GB RAM.
+- It is not necessary to root Android.
+
+## 1) Install AnLinux and Termux from Play Store
+
+At AnLinux choose:
+- Ubuntu
+- XFCE4
+- Copy those commands to Termux to install Linux.
+
+## 2) At Termux
+
+When you get from Termux to Ubuntu bash, you can install Wekan similarly like arm64 or x64:
+https://github.com/wekan/wekan/wiki/Raspberry-Pi
+
+Edit start-wekan.sh so you can start Wekan for example:
+```
+ROOT_URL=http://localhost:2000
+PORT=2000
+```
+At Android webbrowser like Chrome and Firefox browse to http://localhost:2000
+
+## 3) WLAN
+
+If you connect to WLAN, you can get your IP address with command:
+```
+ip address
+```
+Edit start-wekan.sh so you can start Wekan for example:
+```
+ROOT_URL=http://IP-ADDRESS:2000
+PORT=2000
+```
+Then you can use any computer or mobile phone Javascript capable webbrowser at WLAN to use Wekan at http://IP-ADDRESS:2000 like http://192.168.0.100:2000 . [More info about ROOT_URL](Settings).
+
+## 4) Optional: Mobile Linux Desktop
+
+Requirements:
+- 1 WLAN, for example: mobile hotspot, Android device sharing WLAN, hotel WLAN, office WLAN
+- ChromeCast that is connected to HDMI Input of hotel/office/home TV and WLAN
+- Bluetooth keyboard
+- Bluetooth mouse
+- 1 Android device that has:
+  - Wekan installed according to steps 1-3 above
+  - Android VNC client to local AnLinux Ubuntu desktop
+  - Firefox installed with apt-get to that Ubuntu desktop, browsing Wekan at http://IP-ADDRESS:2000
+  - Using ChromeCast to show Android full screen at TV
+
+This way, you have:
+- Big TV display
+- Full size keyboard and mouse
+- Full featured Firefox at Ubuntu Desktop using Wekan