Docker container no longer runs as root

[sjpalf]

We use the kics docker image for running tests and it is no longer working as in #7292 the dockerfile was updated to run as a specific user. It is not clear why this change was made so I am hoping that it can be reverted.

In the getting started documentation the first suggestion is to run kics as a docker container and mount a volume as a container. As in the example command, you will also most likely output a report to that volume. However, the user that is now running the container does not have access to that volume, and that is a very hard problem to solve, especially when the volume mount is a github repo used by multiple developers and your CI system. Can we get the change reverted so the container runs as root again? There is already a solution for running the container as a specific user (using the UBI based images) and I'm assuming this change wasn't meant to break the workflow I described above.