Original example code: MIT, see LICENSE.
Bootstrap 5.3.8: MIT, The Bootstrap Authors. CSS banner retained.
https://github.com/twbs/bootstrap/blob/v5.3.8/LICENSE
Symfony Mailer 8.1.10 and Symfony components: MIT.
https://github.com/symfony/mailer/blob/v8.1.10/LICENSE
Mailpit 1.33.0: MIT. https://github.com/axllent/mailpit/blob/v1.33.0/LICENSE
Composer 2.11.1: MIT. https://github.com/composer/composer/blob/2.11.1/LICENSE
PHP 8.5.12: PHP License 3.01. https://www.php.net/license/3_01.txt
Docker images and Composer vendor dependencies are downloaded separately,
not included in the source archive. Their own license files remain in the installed packages.
