php artisan fails on Ubuntu

[noahc66260]

(From readme in chapter 5)
$ php artisan migrate

PHP Warning: require(/home/noah/build-apis-you-wont-hate/chapter5/bootstrap/../vendor/autoload.php): failed to open stream: No such file or directory in /home/noah/build-apis-you-wont-hate/chapter5/bootstrap/autoload.php on line 17
PHP Fatal error: require(): Failed opening required '/home/noah/build-apis-you-wont-hate/chapter5/bootstrap/../vendor/autoload.php' (include_path='.:/usr/share/php') in /home/noah/build-apis-you-wont-hate/chapter5/bootstrap/autoload.php on line 17

The file chapter5/bootstrap/autoload.php has the line

require DIR.'/../vendor/autoload.php';

but it doesn't exist.

[philsturgeon]

Did you run composer install ?