Install Pusher in laravel-inertiajs-vuejs

Hi developers, i want to show orders to admin live in my store website. but i dont now how pusher work with inertia becuse bootstrap.js file, i deleted it. where most add this code?

\ import Echo from 'laravel-echo';
\ window.Pusher = require('pusher-js');
\ window.Echo = new Echo({
\     broadcaster: 'pusher',
\     key: process.env.MIX_PUSHER_APP_KEY,
\     cluster: process.env.MIX_PUSHER_APP_CLUSTER,
\     forceTLS: true
\ });