`geoipupdate` is not used by any other service nor it is needed for any
service to run. Moreover, it is a one-shot command, causing
`docker compose up --wait` to fail when it exits with a non-zero status.
This happens when one has not yet set up their credentials and they may
choose to never do this.
This PR removes `geoipupdate` from the `docker-compose.yml` file and
moves the command directly into the geoip related script. One may run
this whenever they want to update their GeoIP database.
This PR needs an accompanying docs change.
