Update: Added steam deck gaming mode instructions to readme

README.md

@@ -2,11 +2,27 @@
 
 A simple electron app that gives access to the YouTube TV interface similar to the AndroidTV App. 
 
-## Installation
+## Installation 
+### Windows + Linux
 * Download the Executable or AppImage from releases
 * Run downloaded file
+### Steam Deck (Gaming Mode)
+* Enter Desktop Mode
+* Download AppImage from releases
+* Move file to desired directory
+* Right click file
+* Click ```properties``` and go to ```permissions``` tab
+* Check ```Is Executable``` is ticked and click ```OK```
+* Right click again, now select ```Add to Steam```
+* Open Steam, find the application
+* Set launch parameter to ```--no-sandbox```
+* Launch Game Mode
+* Go to the YouTube non steam game
+* Select Community Control Layout ```YouTube TV Client```
+* You can now launch the app and navigate with controller
+* (Optional) Add artwork using ```SteamGridDB```
 
-## Build from source
+# Build from source
 * Clone git repository
 * Open the project folder in your IDE
 * run ```npm install```