Automatically copy all downloaded packages to a repository on the local filesystem and generating repo metadata.
Note
Generating repo metadata will work only if you have installed createrepo_c package.
/etc/dnf/plugins/local.conf
The minimal content of conf file should contain main and createrepo sections with enabled parameter, otherwise plugin will not work.:
[main]
enabled = true
[createrepo]
enabled = true
For main section you can specify repodir paramater which sets path to local repository.
Other options and comments you can find in configuration file.