getMediawikiSettings.php needs to be updated
When booting the current 1.39.7 image, the following error occurs:
PHP Fatal error: Declaration of GetMediawikiSettings::finalSetup() must be compatible with Maintenance::finalSetup(?MediaWiki\Settings\SettingsBuilder $settingsBuilder = null) in /getMediawikiSettings.php on line 142
The issue appears to be because this script is out-of-date compared to the latest version of this script in the Canasta repo: https://github.com/CanastaWiki/Canasta/blob/master/_sources/canasta/getMediawikiSettings.php