Get cypress working on Laravel Sail

I have attempted the following two guides to setup Cypress with Laravel Sail:

• https://github.com/laracasts/cypress/issues/26
• https://www.underthecocotree.co.uk/blog/testing-with-laravel-sail-and-cypress

However, I have still not been able to get it working even after a number of hours. I have added a reply here (which has yet to be answered): https://github.com/laracasts/cypress/issues/26

Essentially, I do not know how to publish the .env.cypress since when I run sail artisan cypress:boilerplate I get the following:

Cypress not found. Please install it through npm and try again.

npm install cypress --save-dev && npx cypress open

Please see my comment on GitHub for more details, any help would be very much appreciated...