These Docker files are used to build Docker images in our CI. Those Docker images are then used to create containers in which Concourse tasks are run.
To manually build a docker image (e.g. capi-ruby-units) and push to the docker repository:
cd capi-ruby-units
docker build -t $(cat repository) .
docker push $(cat repository)
To manually build the capi-ruby-units image on an ARM Mac (mysql 8.0 is not available for arm64):
cd capi-ruby-units
docker build --platform linux/amd64 -t $(cat repository) .