Internet Systems Consortium BIND (Berkeley Internet Name Domain) container image.
The ISC publishes official container images at
docker.io/internetsystemsconsortium/bind9.
See that page for usage instructions.
The ISC images are tagged with major and minor version numbers (like 9.20 & 9.18) only. I prefer reproducable deployments, which require immutable tags. This repository exists only to produce images with immutable tags.
My code is based on the ISC's Dockerfile at
gitlab.isc.org/isc-projects/bind9-docker,
and there are no material differences between their images and mine
besides the tags, and a slightly different ENTRYPOINT.