Doc for creating Laravel project is not valid

[limitcracker]

https://docs.codeanywhere.com/#installing-laravel-framework

I get the following error after doing all steps:

cabox@LaravelAnswer:~/workspace/LaravelAnswer$ php artisan serve
PHP Warning:  require(/home/cabox/workspace/LaravelAnswer/vendor/autoload.php): failed to open stream: No such file or directory in /home/cabox/workspace/LaravelAnswer/artisan on line 18
PHP Fatal error:  require(): Failed opening required '/home/cabox/workspace/LaravelAnswer/vendor/autoload.php' (include_path='.:/usr/share/php') in /home/cabox/workspace/LaravelAnswer/artisan on line 18