优化docker容器

frontend/Dockerfile

@@ -0,0 +1,29 @@
+# ============================================================
+#  Weibo-HotSign Frontend Dockerfile (Flask)
+# ============================================================
+
+FROM python:3.11-slim
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends curl \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+# 创建 flask_session 目录
+RUN mkdir -p flask_session
+
+RUN groupadd -r appuser && useradd -r -g appuser appuser \
+    && chown -R appuser:appuser /app
+USER appuser
+
+EXPOSE 5000
+
+HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
+    CMD curl -f http://localhost:5000/ || exit 1
+
+CMD ["python", "app.py"]