Installing and configuring CDash

Hi,
I am trying to set yup CDash as per the instructions in:

I am supposed to be directed to install.php, but I get a 503 Error. The setup doesnt provide an install.php. I tried running on my nginx server (with mariadb on linux), as well as with ‘php artisan serve’.
I edited .env as appropriate.
Any ideas would be greatly appreciated.
Cheers

@zackgalbreath