build-frontend.js

const { spawn } = require('child_process');
const path = require('path');

const options = {cwd: path.join('webrecorder', 'frontend'), stdio: 'inherit', shell: true};

spawn('yarn install', [], options).on('exit', (code) => {
  if (code != 0) {
    return process.exit(code);
  }

  spawn('yarn run build-player', [], options).on('exit', (code2) => {
    return process.exit(code2);
  });
});