Initial commit: lottery project structure

Add core project files including:
- Client and server directories
- Backup script
- Package configuration
- Git ignore rules

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/index.js

@@ -0,0 +1,43 @@
+const express = require('express');
+const cors = require('cors');
+const path = require('path');
+
+// 初始化数据库
+require('./db/init');
+
+const authRoutes = require('./routes/auth');
+const ticketRoutes = require('./routes/tickets');
+const lotteryRoutes = require('./routes/lottery');
+const ocrRoutes = require('./routes/ocr');
+
+const app = express();
+const PORT = process.env.PORT || 4444;
+
+// 中间件
+app.use(cors());
+app.use(express.json());
+app.use('/uploads', express.static(path.join(__dirname, 'uploads')));
+
+// API 路由
+app.use('/api/auth', authRoutes);
+app.use('/api/tickets', ticketRoutes);
+app.use('/api/lottery', lotteryRoutes);
+app.use('/api/ocr', ocrRoutes);
+
+// 健康检查
+app.get('/api/health', (req, res) => {
+  res.json({ status: 'ok', time: new Date().toISOString() });
+});
+
+// 静态文件服务 - 前端构建产物
+const clientDist = path.join(__dirname, '../client/dist');
+app.use(express.static(clientDist));
+
+// SPA 路由 - 所有非 API 请求返回 index.html
+app.get('*', (req, res) => {
+  res.sendFile(path.join(clientDist, 'index.html'));
+});
+
+app.listen(PORT, '0.0.0.0', () => {
+  console.log(`服务器运行在 http://0.0.0.0:${PORT}`);
+});