Is it possible to set APP_KERNEL_NAMESPACE through the docker images?

[rlweb]

I'm struggling to get APP_KERNEL_NAMESPACE changed which is needed here https://github.com/php-pm/php-pm-httpkernel/blob/master/Bootstraps/Symfony.php#L60

[johnvandeweghe]

@rlweb Did you ever figure this out? I can't seem to get the nginx image to take a kernel namespace.