chore(compose): insta-lab REDIS_URL + INTERNAL_API_KEY env + depends_on redis

박재오: NAS .env에 INTERNAL_API_KEY=$(openssl rand -hex 32) 추가 필요.
같은 값을 Windows insta-render .env에 보관 (대칭).

Plan-B-Insta Phase 1 완료.

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

docker-compose.yml

@@ -105,8 +105,12 @@ services:
       - CARD_TEMPLATE_DIR=/app/app/templates
       - INSTA_DEFAULT_THEME=${INSTA_DEFAULT_THEME:-default}
       - CORS_ALLOW_ORIGINS=${CORS_ALLOW_ORIGINS:-http://localhost:3007,http://localhost:8080}
+      - REDIS_URL=${REDIS_URL:-redis://redis:6379}
+      - INTERNAL_API_KEY=${INTERNAL_API_KEY:-}
     volumes:
       - ${RUNTIME_PATH}/data/insta:/app/data
+    depends_on:
+      - redis
     healthcheck:
       test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://localhost:8000/health')"]
       interval: 60s