Update README

README.txt

@@ -15,6 +15,8 @@ Setup:
 		* Modify $HOME/.config/systemd/user/sunshine.conf to point to the sunshine executable
 		* systemctl --user start sunshine
 
+	* assets/apps.json is an example of a list of applications that are started just before running a stream:
+		* See below for a detailed explanation
 
 Usage:
 	* run "sunshine"
@@ -34,3 +36,29 @@ Note:
 Credits:
 	* Simple-Web-Server [https://gitlab.com/eidheim/Simple-Web-Server]
 	* Moonlight [https://github.com/moonlight-stream]
+
+
+
+Application List:
+	* You can use Environment variables in place of values
+		* $(HOME) will be replaced by the value of $HOME
+		* $$ will be replaced by $ --> $$(HOME) will be replaced by $(HOME)
+	* env: Adds or overwrites Environment variables for the commands/applications run by Sunshine.
+		* "Variable name":"Variable value"
+	* apps: The list of applications
+		* name: Self explanatory
+		* output <optional>: The file where the output of the command is stored
+			* If it is not specified, the output is ignored
+		* prep-cmd: A list of commands to be run before/after the application
+			* If any of the prep-commands fail, starting the application is aborted
+			* do: Run before the application
+				* If it fails, all 'undo' commands of the previously succeeded 'do' commands are run
+			* undo <optional>: Run after the application has terminated
+				* This should not fail considering it is supposed to undo the 'do' commands.
+				* If it fails, Sunshine is terminated
+		* cmd <optional>: The main application
+			* If not specified, a processs is started that sleeps indefinitely
+
+When an application is started, if there is an application already running, it will be terminated.
+When the application has been shutdown, the stream shuts down as well.
+In addition to the apps listed, one app "Desktop" is hardcoded into Sunshine. It does not start an application, instead it simply starts a stream.