Merge pull request #6 from Xyala/suggestion_extra_instructions

Suggestion extra instructions

README.md

@@ -56,3 +56,16 @@ You can change this using `BLUETOOTH_DEVICE_NAME` environment variable that can
 * Let the music play!
 
 This project is in active development so if you have any feature requests or issues please submit them here on GitHub. PRs are welcome, too.
+
+### Multiple container use
+If you plan to use Balena Sound as part of a multiple container app (for example, having an app with PiHole & Balena sound), don't forget to add the following label to your `docker-compose.yml` file. (source: https://www.balena.io/docs/learn/develop/multicontainer/#labels)
+
+Example:
+```
+bluetooth:
+  build: ./bluetooth-audio
+  privileged: true
+  network_mode: host
+  labels:
+    io.balena.features.dbus: '1'
+```