How to write dynamic routes to a file for pre-rendering

list-routes.js

const fs = require('fs');
const axios = require('axios');
const endOfLine = require('os').EOL;

const domain = `https://cloudengineering.studio`;

const routesOutputFile = 'example-file-name.txt';

const routes = [];

getArticles();

function getArticles() {
  axios.get(articlesApi).then(res => {
    res.data.items.forEach(item => {
      routes.push(`/articles/${item.fields.slug}`);
    });

    writeRoutes();
  })
  .catch(e => console.log(e));
}

function writeRoutes() {
  fs.writeFileSync(routesOutputFile, routes.join(endOfLine), 'utf8');
}