.env tutorial

source env/bin/activate

python3 -m venv tutorial-env
tutorial-env\Scripts\activate.bat

const express = require('express');const app = express();const port = process.env.PORT || 3000;require('dotenv').config();app.get('/', (req, res) => {    res.send(process.env.SECRET_KEY);})app.listen(port, () => {    console.log(`Server is running on port ${port}.`)})

require('dotenv').config()

npm install dotenv --save