Update Dockerfile

Dockerfile

@@ -1,14 +1,22 @@
+# --- Frontend build stage ---
 FROM node:18 AS build
 WORKDIR /app
 COPY package*.json ./
 RUN npm install
 COPY . .
-RUN npm run build
+RUN npm run build   # 这里会产出 /app/dist
 
+# --- Runtime stage ---
 FROM python:3.10
 WORKDIR /app
+
+# 复制构建产物
 COPY --from=build /app/dist ./dist
+
+# 复制后端
 COPY server.py ./
-RUN pip install fastapi uvicorn huggingface_hub
+COPY requirements.txt ./
+RUN pip install -r requirements.txt || pip install fastapi uvicorn huggingface_hub python-multipart
+
 ENV PORT=7860
 CMD ["uvicorn", "server:app", "--host", "0.0.0.0", "--port", "7860"]