實作註冊、登入功能

scripts/test-db.js

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+const mysql = require('mysql2/promise')
+
+async function testDatabaseConnection() {
+  const config = {
+    host: process.env.DB_HOST || 'mysql.theaken.com',
+    port: parseInt(process.env.DB_PORT || '33306'),
+    user: process.env.DB_USER || 'hr_assessment',
+    password: process.env.DB_PASSWORD || 'QFOts8FlibiI',
+    database: process.env.DB_NAME || 'db_hr_assessment',
+  }
+
+  console.log('🔄 正在測試資料庫連接...')
+  console.log('連接資訊:', {
+    host: config.host,
+    port: config.port,
+    user: config.user,
+    database: config.database
+  })
+
+  try {
+    const connection = await mysql.createConnection(config)
+    await connection.ping()
+    console.log('✅ 資料庫連接成功！')
+    
+    // 測試查詢
+    const [rows] = await connection.execute('SELECT 1 as test')
+    console.log('✅ 查詢測試成功:', rows)
+    
+    await connection.end()
+  } catch (error) {
+    console.error('❌ 資料庫連接失敗:', error.message)
+    process.exit(1)
+  }
+}
+
+testDatabaseConnection()