Update README

README.md

@@ -9,9 +9,11 @@ Needs `docker` and `docker-compose`
 xhost +"local:docker@"
 ```
 
-### Change your local user UID in the next line of `docker-compose.yml` for pulseaudio (default 1000)
-```
-- /run/user/[UID]/pulse:/run/user/1000/pulse
+### Add your local user UID and GID in the `.env` file:
+
+```bash
+echo "UID=${UID}" > .env
+echo "GID=${UID}" >> .env
 ```
 
 ### Execute with compose

docker-compose.yml

@@ -16,5 +16,5 @@ services:
       - PULSE_SERVER=unix:/run/user/1000/pulse/native
     volumes:
       - /tmp/.X11-unix:/tmp/.X11-unix:ro
-      - /run/user/1000/pulse:/run/user/1000/pulse
+      - /run/user/${UID:-1000}/pulse:/run/user/${UID:-1000}/pulse
       - ./wahay/pulseaudio.client.conf:/etc/pulse/client.conf:ro