fix: Set HF_HOME in Dockerfile and use JSONResponse in app.py

Dockerfile

@@ -3,6 +3,7 @@ FROM python:3.9-slim
 
 # 设置工作目录
 WORKDIR /app
+ENV HF_HOME=/app/.cache
 
 # 复制依赖文件并安装
 COPY requirements.txt .

app.py

@@ -1,4 +1,5 @@
-from fastapi import FastAPI, Request, Response
+from fastapi import FastAPI, Request
+from fastapi.responses import JSONResponse, Response
 from pydantic import BaseModel
 from transformers import pipeline
 import asyncio
@@ -54,7 +55,7 @@ class TranslationResponse(BaseModel):
 @app.post("/translate", response_model=TranslationResponse)
 async def translate_text(request: TranslationRequest):
     if not state["model_loaded"]:
-        return Response(content={"message": "Model is not loaded yet"}, status_code=503)
+        return JSONResponse(content={"message": "Model is not loaded yet"}, status_code=503)
     
     result = state["translator"](request.text)
     return {"translated_text": result[0]["translation_text"]}