Run a yum repo in docker, including repo updates in a docker run-n-exit command
See "runme" for an example - you can even use that script directly. It sets the host port to run the http server on as well as mounts a host directory (so that you can persist your RPMs) inside the container.
See "runme_update" - configured similarly to "runme", this expects that you have put new rpms (or removed some) in the RPMS dir that's mounted into the yumrepo container. It will generate a new yum data structure reflecting the current contents.