node_conector.js

const mysql = require('mysql');
const dotenv = require("dotenv");
dotenv.config()
const env = process.env;

var connection = mysql.createConnection({
    host     : env.host,
    user     : env.user,
    password : env.password,
    database : env.database
});

connection.query('SELECT 1 + 1 AS solution', function (error, results, fields) {
    if (error) throw error;
    console.log('The solution is: ', results[0].solution);
});

connection.end();