About laravel platform construction

Question

1. I installed the lnmp environment on the virtual machine, and the test was successful (php7.1)
2. I git cloned the official laravel project on github to the root directory
3.composer install
4.composer update
However, the laravel interface still cannot be displayed, please solve

漂亮男人 · Answer

Do you have writable permissions on the running php artisan key:generate？
有没有把./bootstrap/cache和./storage folder?