Revert "Edit server.js"

This reverts commit fefe87d8

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();
 
@@ -45,24 +45,6 @@ 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 {