This Backend uses Laravel 12.
Get started by installing PHP, Laravel, Composer and Node.js using the Docs.
To setup all dependencies, type composer run setup.
Perfect, now you can start the backend by typing composer run dev.
If you encounter problems uploading images, you might need to adjust your upload_max_filesize in your php.ini.
You can find the file with php --ini.
You need to link your storage by executing php artisan storage:link to create a symlink to your local storage.