text: let mysql=require('mysql2/promise'); //mysql 풀을 정의합니다.
  
  let pool=mysql.createPool({
      
      host:process.env.DB_HOST,
      user:process.env.DB_USER,
      password:process.env.DB_PASSWORD,
      port:process.env.DB_PORT,
      database:process.env.DB_DATABASE
     
     }); //쿼리 맵퍼
  
  module.exports = pool