docker run -it --rm \
--cap-add=NET_ADMIN \
--net=host \
--volume $PWD/config:/config/ \
--name strongswan \
wanderadock/strongswan:${TAG}
export TAG=0.1.X
docker build -t wanderadock/strongswan:${TAG} .
docker push wanderadock/strongswan:${TAG}
The tool is released as a docker image, check the repository.