Basic Express server example

app.js

const express = require('express');
const app = express();

app.get('/', (req, res) => {
    res.send('An alligator approaches!');
});

app.listen(3000, () => console.log('Gator app listening on port 3000!'));

package.json

{
  "name": "basic_server",
  "version": "1.0.0",
  "main": "app.js",
  "license": "MIT",
  "scripts": {
    "start": "node ./app.js"
  },
  "dependencies": {
    "express": "^4.16.4"
  }
}