Create a javascript array and then stringify to writefile in JSON.
const path = require('path');
const fs = require('fs');
const dataPath = path.join(__dirname, '../chirps.json');
let chirpArray = [
{ userName: 'Justin', chipText: 'Hello'},
{ userName: 'David', chipText: 'Hey!'},
{ userName: 'James', chipText: 'Chirp!'},
{ userName: 'Cameron', chipText: 'Chirp!'},
{ userName: 'Devon', chipText: 'Chirp!'}
]
let data = JSON.stringify(chirpArray);
fs.writeFile(dataPath, data, (err) => {
console.log(err);
})