Installation fails when document root directory is other than docroot

[lauriii]

The Next.js for Acquia CMS uses web/ as its document root because that's the directory used by the base Docker container: https://github.com/acquia/next-acms/blob/main/drupal/Dockerfile#L82. Installing Acquia CMS fails in this use case:

#0 0.688 Warning: Undefined property: stdClass::$docroot/libraries/{$name} in /opt/drupal/vendor/acquia/acquia-cms-starterkit/src/Helpers/Task/Steps/DownloadModules.php on line 94
#0 0.688
#0 0.688
#0 0.688 Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /opt/drupal/vendor/acquia/acquia-cms-starterkit/src/Helpers/Task/Steps/DownloadModules.php:95
#0 0.688 Stack trace:
#0 0.688 #0 /opt/drupal/vendor/acquia/acquia-cms-starterkit/src/Helpers/Task/Steps/DownloadModules.php(95): in_array('nnnick/chartjs', NULL)
#0 0.688 #1 /opt/drupal/vendor/acquia/acquia-cms-starterkit/src/Helpers/Task/BuildTask.php(157): AcquiaCMS\Cli\Helpers\Task\Steps\DownloadModules->execute(Array)
#0 0.688 #2 /opt/drupal/vendor/acquia/acquia-cms-starterkit/src/Commands/AcmsBuildCommand.php(126): AcquiaCMS\Cli\Helpers\Task\BuildTask->run(Array)
#0 0.688 #3 /opt/drupal/vendor/symfony/console/Command/Command.php(326): AcquiaCMS\Cli\Commands\AcmsBuildCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#0 0.688 #4 /opt/drupal/vendor/symfony/console/Application.php(1063): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#0 0.688 #5 /opt/drupal/vendor/symfony/console/Application.php(320): Symfony\Component\Console\Application->doRunCommand(Object(AcquiaCMS\Cli\Commands\AcmsBuildCommand), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#0 0.688 #6 /opt/drupal/vendor/symfony/console/Application.php(174): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#0 0.688 #7 /opt/drupal/vendor/acquia/acquia-cms-starterkit/bin/acms.php(62): Symfony\Component\Console\Application->run()
#0 0.688 #8 /opt/drupal/vendor/acquia/acquia-cms-starterkit/bin/acms(9): require('/opt/drupal/ven...')
#0 0.688 #9 /opt/drupal/vendor/bin/acms(119): include('/opt/drupal/ven...')
#0 0.688 #10 {main}
#0 0.688   thrown in /opt/drupal/vendor/acquia/acquia-cms-starterkit/src/Helpers/Task/Steps/DownloadModules.php on line 95