Environment variables in Node.js
Learn how to work with environment variabes in Node.js Can check environment variables: Start node REPL: node in terminal (before this check if node is installed by node -v) console.log(process.env) const app = require('http').createServer((req, res) => res.send('Ahoy!')); //in case of PORT, this particular var is undefined usually in all cloud providers, so this way works - gets 3000, or prefers if YOU define something in sys env const PORT = process....