fix:检查版本升级导致的环境报错

backend/Dockerfile

@@ -3,11 +3,16 @@ FROM docker.m.daocloud.io/library/python:3.11-slim
 WORKDIR /app
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
-    PYTHONUNBUFFERED=1
+    PYTHONUNBUFFERED=1 \
+    TZ=Asia/Shanghai
 
 COPY backend/requirements.txt .
 
-RUN pip install --no-cache-dir -r requirements.txt
+RUN apt-get update && apt-get install -y --no-install-recommends tzdata \
+    && ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
+    && echo "Asia/Shanghai" > /etc/timezone \
+    && pip install --no-cache-dir -r requirements.txt \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 COPY backend ./backend