Initial backend code

src/app.js

@@ -0,0 +1,53 @@
+const express = require('express');
+const cors = require('cors');
+const helmet = require('helmet');
+const morgan = require('morgan');
+require('dotenv').config();
+
+const connectDB = require('./config/database');
+const errorHandler = require('./middleware/errorHandler');
+const { notFound } = require('./middleware/notFound');
+
+const authRoutes = require('./routes/auth');
+const equityRoutes = require('./routes/equity');
+const userRoutes = require('./routes/user');
+const tradeRoutes = require('./routes/trade');
+
+const app = express();
+
+connectDB();
+
+app.use(helmet());
+app.use(cors());
+app.use(express.json({ limit: '10mb' }));
+app.use(express.urlencoded({ extended: true }));
+
+if (process.env.NODE_ENV === 'development') {
+  app.use(morgan('dev'));
+}
+
+app.get('/health', (req, res) => {
+  res.json({
+    status: 'ok',
+    timestamp: new Date().toISOString(),
+    service: 'quanyixiaozhushou-backend'
+  });
+});
+
+app.use('/api/auth', authRoutes);
+app.use('/api/equity', equityRoutes);
+app.use('/api/user', userRoutes);
+app.use('/api/trade', tradeRoutes);
+
+app.use(notFound);
+app.use(errorHandler);
+
+const PORT = process.env.PORT || 3000;
+
+app.listen(PORT, '0.0.0.0', () => {
+  console.log(`🚀 权益小助手后端服务运行在端口 ${PORT}`);
+  console.log(`📊 环境: ${process.env.NODE_ENV || 'development'}`);
+  console.log(`🌐 访问地址: http://192.168.3.250:${PORT}`);
+});
+
+module.exports = app;