How to restrict access to particular IP address or domain in laravel web application?

Can anyone share me any idea (free) that I can make my Laravel Application (costumer website) usable to only single IP or domain?

After I host the application into my client's end, I want my code to be secured from being used again for other projects.

I want to prevent my client from re-publish my code

for example: remote confirmed from my web service for Client IP (costumer website)

via Chebli Mohamed