Looking to make some modifications to the existing uTorrent rockon to allow for the setting of UID and GID like the docker it is based on provides for. I already have the changes and an updated json file but wanted to test it before I pushed it. How do i go about doing that? When I try to load it into the rockson-metastore, it throws an error no matter what I name it. Is there a good way to test this change or should I just make the pull request?