feat(image-render): main + Dockerfile + compose entry (port 18714)

services/image-render/Dockerfile

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+FROM python:3.12-slim-bookworm
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates \
+ && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir --timeout 600 --retries 5 -r requirements.txt
+
+COPY . .
+
+EXPOSE 8000
+CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "1"]

services/image-render/env.example

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+# Redis (NAS)
+REDIS_URL=redis://192.168.45.54:6379
+
+# NAS image-lab webhook
+NAS_BASE_URL=http://192.168.45.54:18802
+INTERNAL_API_KEY=replace-me
+
+# API provider keys (worker reports failed if missing)
+OPENAI_API_KEY=
+GEMINI_API_KEY=
+# Seedance key not used by image-render
+
+# FLUX local
+COMFYUI_URL=http://host.docker.internal:8188
+FLUX_BLOCK_TRADING_HOURS=1
+
+# NAS SMB mount target (image-render writes to this, NAS reads via /media/image/)
+IMAGE_MEDIA_ROOT=/mnt/nas/webpage/data/image

services/image-render/main.py

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+"""image-render FastAPI entry — health + lifespan (worker loop spawn)."""
+from __future__ import annotations
+
+import asyncio
+import logging
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+
+import worker
+
+logging.basicConfig(level=logging.INFO, format="%(asctime)s %(name)s %(levelname)s %(message)s")
+logger = logging.getLogger(__name__)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    worker_task = asyncio.create_task(worker.worker_loop())
+    logger.info("image-render lifespan 시작")
+    try:
+        yield
+    finally:
+        worker_task.cancel()
+        try:
+            await worker_task
+        except asyncio.CancelledError:
+            pass
+        logger.info("image-render lifespan 종료")
+
+
+app = FastAPI(lifespan=lifespan)
+
+
+@app.get("/health")
+def health():
+    return {"ok": True, "service": "image-render"}

services/image-render/requirements.txt

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+fastapi==0.115.6
+uvicorn[standard]==0.34.0
+requests==2.32.3
+redis>=5.0
+httpx>=0.27
+openai>=1.50.0
+pytest>=8.0
+pytest-asyncio>=0.24
+respx>=0.21