Build automation for CoreDNS with Unbound plugin

This repository is used to have reproducible builds of Docker images based on

https://github.com/coredns/coredns

Usage

To build a Docker image for a new release:

1. Create a branch.
2. Modify the UPSTREAM_TAG variable in the .circleci/config.yml file. Set it to the release tag of the upstream repo which should be used. Push to your branch.
3. Create a pull request for your branch.
4. Check the build job in CI. As a result, there should be an image tagged with the commit SHA in the registry.
5. Merge the PR after reviews.
6. Tag a release. As a result, there should be a Docker image with the release tag in the registry.