Docker Config?

How can I pass parameters to the docker server when I start it?

It's common on other distributions to package a file for this type of stuff in
/etc/docker/config
(or other places depending on the distro and package)

The default package in Alpine includes /etc/docker.....but not config.

I finally got my wish by hacking /etc/init.d/docker directly, but that will be lost as soon as we update the package right?