Guide on adding third-party packages to chiseled base image.

Our containers depend on the [geoipupdate](https://github.com/maxmind/geoipupdate/releases/download/v6.0.0/geoipupdate_6.0.0_linux_amd64.deb) utility to keep the MaxMind database fresh on the container. How can we install the deb package in our image that is based on chiseled image? When we have the `RUN dpkg -i /geoipupdate.deb` in the docker file, we get a `failed to solve: process "/bin/sh -c dpkg -i /geoipupdate.deb" did not complete successfully` error during build. This also relies on cron to run the utility on a schedule.