Struggling to install instant view with Laravel

I’m trying to install instantsearch with laravel using the instructions here:

https://www.algolia.com/doc/tutorials/getting-started/getting-started-with-laravel-scout-vuejs/#setup-vuejs

I’m not familiar with npm but when I run

npm run watch

I get the error

npm ERR! missing script: watch

I’ve updated all the packages and I’m running Laravel 5.6

Thanks