feat: 实现微信小程序后端接口与用户认证系统

新增微信登录/注册合一接口、资料完善接口和token刷新接口
重构用户服务层，支持自动维护用户类型和资料完整度
引入JWT认证中间件和请求验证中间件
更新文档与测试用例，支持dist构建部署

back-end/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:22-alpine
+FROM node:22-alpine AS build
 
 WORKDIR /app
 
@@ -6,7 +6,17 @@ COPY package*.json ./
 RUN npm install
 
 COPY . .
+RUN npm run build
+
+FROM node:22-alpine AS production
+
+WORKDIR /app
+
+COPY --from=build /app/package*.json ./
+RUN npm install --omit=dev
+
+COPY --from=build /app/dist ./dist
 
 EXPOSE 3000
 
-CMD ["node", "src/index.js"]
+CMD ["node", "dist/src/index.js"]