"groupadd: Command not found" in docker container even though I install it and I am root
Your problem is that groupadd is not a package, so you can't install it like you are attempting to do at the moment.
You can install shadow-utils.x86_64, which will make the groupadd command available.
yum install shadow-utils.x86_64 -yOr to modify your "RUN" line:
RUN yum-config-manager --enable epel && yum update -y && yum -y install shadow-utils.x86_64 xmlstarlet saxon augeas bsdtar unzip && yum clean allThat should fix your issue.
You also don't need the epel repository, so you can remove that bit all together if you want.