> CentOS 7.1+ 64 bit version

good luck on CentOS 8. docker does not maintain el8 rpms, and installing the most recent offering from Docker requires that you work around several package conflict issues.

in the end it just didn't feel good, and i ended up going down the (clearly recommended) podman route instead. however, rootless podman containers have their own gotchas...

i kind of wish i'd installed debian on my homeserver instead. :)