docs: improve examples (#1000)

docs/source/about/usage.rst

@@ -206,7 +206,7 @@ Application List
 - ``"Variable name":"Variable value"``
 - ``apps`` - The list of applications
 - Advanced users may want to edit the application list manually. The format is ``json``.
-- Example application:
+- Example ``json`` application:
    .. code-block:: json
 
       {
@@ -248,6 +248,8 @@ Application List
 
    - ``working-dir`` - The working directory to use. If not specified, Sunshine will use the application directory.
 
+- For more examples see :ref:`app examples <about/app_examples:app examples>`.
+
 Considerations
 --------------
 - When an application is started, if there is an application already running, it will be terminated.
@@ -256,8 +258,9 @@ Considerations
   - For example, if you attempt to run ``steam`` as a ``cmd`` instead of ``detached`` the stream will immediately fail.
     This is due to the method in which the steam process is executed. Other applications may behave similarly.
 
-- 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.
+- The "Desktop" app works the same as any other application except it has no commands. It does not start an application,
+  instead it simply starts a stream. If you removed it and would like to get it back, just add a new application with
+  the name "Desktop" and "desktop.png" as the image path.
 - For the Linux flatpak you must prepend commands with ``flatpak-spawn --host``.
 
 HDR Support