Fix missing COPY, update.sh supported versions

Should we adjust the recommended place to put the conf file while we are fixing this line?  Volumes can get hairy, especially if they bind mount something and a "where did my file go?" comes up.  Kind of like https://github.com/nginxinc/docker-nginx/issues/5.
Does redis actually see the change and auto-reload?  Doesn't it require an explicit restart to do that anyhow?