fixing permission issues

docker-compose.yaml

@@ -34,6 +34,13 @@ services:
       - LAVALINK_SERVER_PASSWORD=${LAVALINK_PASSWORD}
     volumes:
       - ./lavalink/application.yml:/opt/Lavalink/application.yml:ro
-      - ./lavalink/plugins/:/opt/Lavalink/plugins/
+      # Named volume (managed by Docker) rather than a host bind mount. Docker
+      # initializes it from the image, so it's owned by Lavalink's container user
+      # and the plugin jars download without permission errors. No root-owned (or
+      # UID-mismatched) plugins/ dir in the deploy directory.
+      - lavalink-plugins:/opt/Lavalink/plugins
     ports:
       - "2333:2333"
+
+volumes:
+  lavalink-plugins: