What is the confd package required in the Rock container base.?

Link to Dockerfile: https://github.com/rocknsm/rock-containers/blob/master/base/docker/Dockerfile

I can’t seem to find the confd RPM referenced below.

Add confd as a standard way to render configs
RUN yum -y install --setopt=tsflags=nodocs epel-release;
yum -y --setopt=tsflags=nodocs update;
yum install -y --setopt=tsflags=nodocs confd;
mkdir -p /etc/confd/{conf.d,templates};
rm -rf /var/cache/yum/*;
systemctl mask sys-fs-fuse-connections.mount

UPDATE: I found the confd package in the rocknsm-2.1 repository. However I noticed that only rocknsm-testing is included in the base container directory.