Download the zipped github folder of this project and unzip the folder in your computer system. Open the project folder with command prompt and type
composer update --no-scripts
After that create database and give the database a name. Enter the project folder and rename the .env.example file to .env Enter your correct database credentials in .env file. Again open command prompt and type
php artisan migrate
After that type
php artisan serve
Remember everytime you download a laravel github folder, this way you should run the laravel app.