Readme: add nightly testing

Signed-off-by: Vasiliy Doylov <nekocwd@mainlining.org>

README.md

@@ -1,5 +1,5 @@
 # Q6Meow
-To start call audio routing on qualcomm devices you need to start playback and capture streams on the `VoiceMMode1` device. 
+To start call audio routing on qualcomm devices you need to start playback and capture streams on the `VoiceMMode1` device.
 
 This program used to start streams on the `VoiceMMode1` device.
 
@@ -7,11 +7,24 @@ In the future, it will be replaced by a codec-to-codec connection in the kernel,
 
 ## Difference from [q6voiced](https://gitlab.postmarketos.org/postmarketOS/q6voiced):
 * Uses the Alsa library instead of TinyAlsa
-* React to ALSA events instead of ModemManager events 
+* React to ALSA events instead of ModemManager events
 * Written in [Vala](https://vala.dev/)
 
 ## How it works:
-![Diagram](q6meow.svg) 
+![Diagram](q6meow.svg)
+
+
+## PostmarketOS nightly testing:
+1) [Add my nightly repo](https://git.nekocwd.duckdns.org/Administration/Documentation/src/branch/master/install-nightly-repo.md)
+2) Install package
+  ```
+  sudo apk add q6meowd@nightly
+  ```
+3) Enable demon autostart
+  ```
+  sudo rc-update add q6meowd
+  ```
+
 
 ## Usage:
 
@@ -32,9 +45,9 @@ In the future, it will be replaced by a codec-to-codec connection in the kernel,
 3. Compile and install
     ```
     meson install -C build
-    ``` 
+    ```
 
 ## Removing:
 ```
 ninja uninstall -C build
-```
+```