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Create Drupal 10 project:

[user@server public_html]$ composer create-project drupal/recommended-project \vmg-d10

En na een tijdje:

Congratulations, you’ve installed the Drupal codebase
from the drupal/recommended-project template!

Next steps:
* Install the site: https://www.drupal.org/docs/installing-drupal
* Read the user guide: https://www.drupal.org/docs/user_guide/en/index.html
* Get support: https://www.drupal.org/support
* Get involved with the Drupal community: 
    https://www.drupal.org/getting-involved
* Remove the plugin that prints this message: 
    composer remove drupal/core-project-message
* Homepage: https://www.drupal.org/project/drupal
* Support:
  * docs: https://www.drupal.org/docs/user_guide/en/index.html
  * chat: https://www.drupal.org/node/314178

Add retrofit-drupal

[user@server public_html]$ composer require retrofit-drupal/retrofit

Cannot use retrofit-drupal/retrofit's latest version 0.1.10 as it requires php ^8.1 which is not satisfied by your platform.

In PackageDiscoveryTrait.php line 318:

Package retrofit-drupal/retrofit has requirements incompatible with your PHP version, PHP extensions and Composer version:
- retrofit-drupal/retrofit 0.1.10 requires php ^8.1 which does not match your installed version 7.4.33.

2nd trial:

[user@server vmg-d10]$ composer require retrofit-drupal/retrofit
./composer.json has been updated
Running composer update retrofit-drupal/retrofit
Loading composer repositories with package information
Updating dependencies
Nothing to modify in lock file
Installing dependencies from lock file (including require-dev)
Nothing to install, update or remove
Generating autoload files
43 packages you are using are looking for funding.
Use the `composer fund` command to find out more!

In Process.php line 147:

The Process class relies on proc_open, which is not available on your PHP installation.