chore: FFmpeg 설치 + Nginx /media/videos/ + docker-compose volumes + 환경변수

docker-compose.yml

@@ -66,6 +66,7 @@ services:
       - CORS_ALLOW_ORIGINS=${CORS_ALLOW_ORIGINS:-http://localhost:3007,http://localhost:8080}
     volumes:
       - ${RUNTIME_PATH}/data/music:/app/data
+      - ${RUNTIME_PATH:-.}/data/videos:/app/data/videos
     healthcheck:
       test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"]
       interval: 30s