Support custom docker arguments

[RayBB]

Add option for custom docker arguments

For example:
docker run --cap-add SYS_ADMIN --device /dev/fuse --security-opt apparmor:unconfined

This is necessary for me to run rclone mount in a container with FUSE.

I asked about this in Discord here and eventually found this message where @andrasbacsai said it would be supported eventually.

Thought I'd post this request on GitHub so others can easily find it and upvote to show they want it.

[andrasbacsai]

I will add initial support for a few options in v202. More info here.

[svallory]

It looks like I can only set options when I'm building from code. Can we have that for docker images too?

[jcunix]

I believe this is what I am running into as well.

[RayBB]

What problem are you having?