feat: Initial commit of PDF Tools project

Dockerfile

@@ -0,0 +1,67 @@
+# 多阶段构建 - 前端
+FROM node:18-alpine AS frontend-build
+
+WORKDIR /app/client
+
+# 复制前端package文件
+COPY client/package*.json ./
+
+# 安装前端依赖
+RUN npm ci --only=production
+
+# 复制前端源代码
+COPY client/ ./
+
+# 构建前端应用
+RUN npm run build
+
+# 多阶段构建 - 后端
+FROM node:18-alpine AS backend
+
+WORKDIR /app
+
+# 安装系统依赖
+RUN apk add --no-cache \
+    python3 \
+    make \
+    g++ \
+    cairo-dev \
+    jpeg-dev \
+    pango-dev \
+    musl-dev \
+    giflib-dev \
+    pixman-dev \
+    pangomm-dev \
+    libjpeg-turbo-dev \
+    freetype-dev
+
+# 复制后端package文件
+COPY server/package*.json ./
+
+# 安装后端依赖
+RUN npm ci --only=production
+
+# 复制后端源代码
+COPY server/ ./
+
+# 从前端构建阶段复制构建结果
+COPY --from=frontend-build /app/client/build ./public
+
+# 创建必要的目录
+RUN mkdir -p uploads outputs logs
+
+# 设置权限
+RUN chown -R node:node /app
+
+# 切换到非root用户
+USER node
+
+# 暴露端口
+EXPOSE 3001
+
+# 健康检查
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD node healthcheck.js
+
+# 启动命令
+CMD ["npm", "start"]