iwar is available from https://github.com/beave/iwar
This repo is just a Dockerfile that builds/packages it. See the iwar repository for more information about iwar itself.
docker build -t iwar .
See iwar documentation for command line parameters, but broadly speaking you can run it like this:
docker run --rm -it --device=/dev/ttyUSB0 iwar iwar -r 4000-4999