chore(env): update PLAYOUT_PORT to 8081 and normalize line endings

docker-compose.prod.yml

@@ -11,6 +11,8 @@ services:
     restart: unless-stopped
     env_file:
       - .env
+    ports:
+      - "${PLAYOUT_PORT:-8081}:8081"
     volumes:
       - ./data/playlist:/app/playlist:rw
       - ./data/media:/app/media:ro