feat(music-render): services/docker-compose에 music-render 서비스 (SP-5)

포트 18711, REDIS_URL/NAS_BASE_URL/INTERNAL_API_KEY/SUNO_API_KEY/MUSIC_AI_SERVER_URL env.
host.docker.internal 매핑 (MusicGen native 호스트).
SMB /mnt/nas/webpage/data/music 마운트.
Plan-B-Music Phase 2 완료 — 박재오 머신에서 .env 작성 + 빌드 + 시작 대기.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

services/docker-compose.yml

@@ -23,3 +23,29 @@ services:
       interval: 60s
       timeout: 5s
       retries: 3
+
+  music-render:
+    build:
+      context: ./music-render
+    container_name: music-render
+    restart: unless-stopped
+    ports:
+      - "18711:8000"
+    environment:
+      - TZ=Asia/Seoul
+      - REDIS_URL=${REDIS_URL:-redis://192.168.45.54:6379}
+      - NAS_BASE_URL=${NAS_BASE_URL:-http://192.168.45.54:18600}
+      - INTERNAL_API_KEY=${INTERNAL_API_KEY:-}
+      - SUNO_API_KEY=${SUNO_API_KEY:-}
+      - MUSIC_AI_SERVER_URL=${MUSIC_AI_SERVER_URL:-http://host.docker.internal:8765}
+      - MUSIC_MEDIA_ROOT=${MUSIC_MEDIA_ROOT:-/mnt/nas/webpage/data/music}
+      - MUSIC_MEDIA_URL_PREFIX=${MUSIC_MEDIA_URL_PREFIX:-/media/music}
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    volumes:
+      - /mnt/nas/webpage/data/music:/mnt/nas/webpage/data/music
+    healthcheck:
+      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"]
+      interval: 60s
+      timeout: 5s
+      retries: 3