调整文档路径

backend/Dockerfile

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+# syntax=docker/dockerfile:1
+# MCP Auth Admin — 后端（FastAPI，纯 API 服务，不托管前端静态文件）
+
+FROM python:3.12-slim
+WORKDIR /app
+
+# 依赖单独成层，利用缓存
+COPY requirements.txt ./requirements.txt
+RUN pip install --no-cache-dir --timeout 120 --retries 5 \
+    -i https://pypi.tuna.tsinghua.edu.cn/simple \
+    -r requirements.txt
+
+# 后端源码
+COPY app ./app
+
+WORKDIR /app
+EXPOSE 8003
+
+# 不挂载前端静态文件，纯 API 服务
+CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8003"]