In Laravel 8, there is new package available called https://laravel.com/docs/8.x/sail.
We use this to run the site locally, and test it.
All you need is to install https://www.docker.com/ in your compute.
After that, open the code and execute the command
./vendor/bin/sail up
You can add alias for the sail command.
Then open the site on localhost, and the install window should appear.