Edit server.js

server.js

 require('dotenv').config();
 const express = require('express');
 const cors = require('cors');
+const mysql = require('mysql2');
 const bcrypt = require('bcrypt');
 const jwt = require('jsonwebtoken');
 const path = require('path');
 const multer = require('multer');
 const fs = require('fs');
-const db = require('./config/database');
 
 const app = express();
 
@@ -45,6 +45,24 @@ const upload = multer({
     }
 });
 
+// เชื่อมต่อฐานข้อมูล
+const db = mysql.createConnection({
+  host: process.env.DB_HOST,
+  user: process.env.DB_USER,
+  password: process.env.DB_PASSWORD,
+  database: process.env.DB_NAME,
+  port: process.env.DB_PORT
+});
+
+// ทดสอบการเชื่อมต่อฐานข้อมูล
+db.connect(error => {
+  if (error) {
+    console.error('Error connecting to the database:', error);
+    return;
+  }
+  console.log("Successfully connected to the database.");
+});
+
 // Register
 app.post('/register', async (req, res) => {
   try {