feat: add backend server

server/index.js

@@ -0,0 +1,26 @@
+import dotenv from 'dotenv'
+dotenv.config()
+
+// 连接数据库
+import connectDB from './database.js'
+await connectDB()
+
+import express from 'express'
+import { userRouter } from './controller/user.js'
+import { stabilityRouter } from './controller/stability.js'
+import { standardRouter } from './controller/standard.js'
+
+const app = express()
+app.use(express.json())
+
+// 注册路由
+app.use('/api/user', userRouter)
+app.use('/api/stability', stabilityRouter)
+app.use('/api/standard', standardRouter)
+
+// 从环境变量中读取端口号，如果环境变量中没有指定端口号，则使用默认的端口号
+const PORT = process.env.PORT || 5000
+
+app.listen(PORT, () => {
+    console.log(`Server is running on http://localhost:${PORT}`)
+})