Add installation section in readme.md

README.md

@@ -5,10 +5,73 @@ ExpressLRS Configurator is a cross-platform build & configuration tool for the
 
 ## Need help? Confused? Join the Community!
 
-- [RCGroups Discussion](https://www.rcgroups.com/forums/showthread.php?3437865-ExpressLRS-DIY-LoRa-based-race-optimized-RC-link-system)
 - [Discord Chat](https://discord.gg/dS6ReFY)
 - [Facebook Group](https://www.facebook.com/groups/636441730280366)
 
+## Installation
+
+We provide a standalone program for 64bit Windows, Linux and Mac.
+
+Download the installer from [Releases](https://github.com/jurgelenas/expresslrs-configurator/releases) page.
+
+### Notes
+
+#### Windows
+
+The minimum required version of windows is Windows 8.
+
+#### macOS
+
+Changes to the security model used in the latest versions of MacOS X 10.14 (Mojave) and 10.15 (Catalina)
+mean that the operating system will show an error message ('"ExpressLRS Configurator.app" is damaged and can’t be
+opened. You should move it to the Trash.') when trying to install the application. To work around this, run the
+following command in a terminal after installing:
+
+```
+sudo xattr -rd com.apple.quarantine /Applications/ExpressLRS\ Configurator.app.
+```
+
+#### Linux
+
+Linux users have to install udev rules for PlatformIO supported boards/devices. The latest version of rules may be found
+at https://raw.githubusercontent.com/platformio/platformio-core/master/scripts/99-platformio-udev.rules
+
+This file must be placed at `/etc/udev/rules.d/99-platformio-udev.rules` (preferred location) or
+`/lib/udev/rules.d/99-platformio-udev.rules` (required on some broken systems).
+
+Please open system Terminal and type:
+
+```bash
+# Recommended
+curl -fsSL https://raw.githubusercontent.com/platformio/platformio-core/master/scripts/99-platformio-udev.rules | sudo tee /etc/udev/rules.d/99-platformio-udev.rules
+
+# OR, manually download and copy this file to destination folder
+sudo cp 99-platformio-udev.rules /etc/udev/rules.d/99-platformio-udev.rules
+```
+
+Restart "udev" management tool:
+
+```bash
+sudo service udev restart
+# or
+sudo udevadm control --reload-rules
+sudo udevadm trigger
+```
+
+Ubuntu/Debian users may need to add own "username" to the "dialout" group if they are not "root", doing this issuing:
+
+```
+sudo usermod -a -G dialout $USER
+sudo usermod -a -G plugdev $USER
+```
+
+Similarly, Arch users may need to add their user to the “uucp” group
+
+```bash
+sudo usermod -a -G uucp $USER
+sudo usermod -a -G lock $USER
+```
+
 ## Architecture
 
 ```