Any container .tar files placed in a containers-<host_type> directory will be loaded as a container for the said host type.
The container will be tagged with the relative path starting from containers-<host_type>, without the .tar file extension.
For example, the file containers-glitchtip/glitchtip/glitchtip:v4.1.3.tar will be loaded as a container tagged glitchtip/glitchtip:v4.1.3 for the glitchtip host type.
Note that a nested directory structure is needed to tag containers which have both an organization and a container name.