Supporting running spilo docker image with rootless user

[whitepiratebaku]

Is there any requirements spilo image has root access for container? I see on Dockerfile no user defined so root being used, and when we tried to run container with postgres user at startup we at least get following error:

/launch.sh: 30: cannot create /etc/passwd: Permission denied

So do you have any plans to work on this?

[a1994sc]

I would also like the ability to run as rootless