This is just a Docker image for haveibeenpwned-downloader. See HaveIBeenPwned/PwnedPasswordsDownloader on Github for information on the actual project.
Checkout this repository, and do a:
docker build . -t haveibeenpwned-downloader:latest
First create a volume where the downloaded data will be stored:
docker volume create --label haveibeenpwned-downloader
Then run the image to retrieve the data:
docker run --rm --name haveibeenpwned-downloader -v haveibeenpwned-downloader:/data haveibeenpwned-downloader
The data will be in your volume.