NodeJS

bash sudo apt install curl curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash - sudo apt install nodejs node --version npm --version

KoaJS

yarn add koa or npm install koa Create a file (koa.js) and paste the following: ```javascript const Koa = require('koa'); const app = new Koa();

app.use(async ctx => { ctx.body = 'Hello World'; });

app.listen(3000, () => console.log('Running on http://localhost:3000/')); ``` Check http://localhost:3000 Great, it's working!

(by the way)