węzeł dotenv
require('dotenv').config();
console.log(process.env.MY_ENV_VAR);
garzj
require('dotenv').config();
console.log(process.env.MY_ENV_VAR);// when yours .env is in other place then default, you can set path to it
const path = require('path')
require('dotenv').config({ path: path.resolve(__dirname, '../../.env') }); //use as many '../' as you need