// server.js

console.log(`Your port is ${process.env.PORT}`); // undefined

const dotenv = require('dotenv');

dotenv.config();

console.log(`Your port is ${process.env.PORT}`); // 8626

First of all run this in your terminal

npm i dotenv

then on the top of your main file 

require("dotenv").config();

and then u can use your env vars like

​

process.env.DISCORD_JS_BOT_TOKEN

var myEnvVariable = process.env.ENV_VARIABLE_NAME

process.env.FOO = "bar"

console.log(process.env.FOO) // "bar"

console.log(app.get('env'))

​

if(app.get('env').toLowerCase()==="development"){

    app.use(morgan("dev"))

}

alias kill3000="fuser -k -n tcp 3000"