init: 整合项目（dashboard + www + docs）

dashboard/backend/Dockerfile

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+FROM node:22-alpine
+
+# 统一时区为东八区
+ENV TZ=Asia/Shanghai
+RUN apk add --no-cache tzdata && \
+    cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
+    echo "Asia/Shanghai" > /etc/timezone
+
+WORKDIR /app
+
+# Create logs directory
+RUN mkdir -p /app/logs
+
+# Install dependencies
+COPY package.json pnpm-lock.yaml ./
+RUN corepack enable pnpm && pnpm install --frozen-lockfile --prod
+
+# Copy application code
+COPY src/ ./src/
+
+# Expose port
+EXPOSE 8000
+
+# Run the application
+CMD ["node", "src/app.js"]