feat: add custom env volume path for stream containers

docker/docker-compose.yml

@@ -24,9 +24,9 @@ services:
     depends_on:
       - icecast
     volumes:
-      - ../music/library:/app/music:ro
+      - ${MUSIC_LIBRARY:-../music/library}:/app/music:ro
       - ./asteroid-radio-docker.liq:/app/asteroid-radio.liq:ro
-      - ../stream-queue.m3u:/app/stream-queue.m3u:ro
+      - ${QUEUE_PLAYLIST:-../stream-queue.m3u}:/app/stream-queue.m3u:ro
     restart: unless-stopped
     networks:
       - asteroid-network