chore: 优化 Docker 配置，添加生产环境部署脚本和文档

frontend/Dockerfile

@@ -1,13 +1,10 @@
-# Use an official Node runtime as a parent image
-FROM node:22-alpine
+# 构建阶段
+FROM node:20-alpine AS builder
 
-# Set working directory
+# 设置工作目录
 WORKDIR /app
 
-# Install build dependencies for native modules
-RUN apk add --no-cache autoconf automake libtool make g++ zlib-dev nasm python3
-
-# Install dependencies
+# 安装依赖
 COPY package.json package-lock.json* ./
 RUN npm install --registry=https://registry.npmmirror.com
 
@@ -16,14 +13,22 @@ COPY . .
 
 # 接收构建参数
 ARG VITE_API_URL=/api
-# 设置环境变量供构建时使用
-ENV VITE_API_URL=$VITE_API_URL
+ENV VITE_API_URL=${VITE_API_URL}
 
 # 构建生产环境代码
 RUN npm run build
 
-# 暴露应用运行的端口
-EXPOSE 15173
+# 生产阶段 - 使用 Nginx
+FROM nginx:alpine
 
-# 启动应用 (Preview 模式)
-CMD ["npm", "run", "preview", "--", "--host", "0.0.0.0", "--port", "15173"]
+# 复制 Nginx 配置
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# 从构建阶段复制构建产物
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# 暴露端口
+EXPOSE 80
+
+# 启动 Nginx
+CMD ["nginx", "-g", "daemon off;"]