I don’t think this is a security issue or anything, but the image has dirs that look like un-interpreted env vars.
sudo docker create --name="tmp_$$" dhi.io/php:8.2.30-debian13-fpm
sudo docker export tmp_$$ | tar t | head -n 10
${PHP_INI_DIR}/
${PHP_INI_DIR}/conf.d/
${PHP_INI_DIR}/conf.d/fpm.ini
.dockerenv
bin
boot/
dev/
dev/console
dev/pts/
dev/shm/