I bet people won't. Ready-made docker solutions are based around nginx/apache and shared hosting stacks were in place long before php built-in webserver was available. There's no reasons and incentives to change all that.
This web server has been available for a long time. Sure you can misuse pretty much any technology. Rolling your own crypto is possible too but most people don't do it.
People tend to use ready-made Docker containers for PHP deployment. The official PHP image has apache and fpm versions: https://hub.docker.com/_/php/