This image is a container housing InspIRCd. The current version is 2.0.18.
To use this image you will need to populate the /inspircd/conf directory with configuration files. There are two ways to do this:
Bind a conf/ directory from the host machine
docker run -v /my/conf:/inspircd/conf -p 6667 insomniairc/inspircd
Create your own image using insomniairc/inspircd as a base. For an example, see http://github.com/insomniairc/insomniaircd