Build the images from this directory using:
cd ckan-base/
docker build -t ckan/ckan-base:testing-only.2.9 -f 2.9/Dockerfile .
docker build -t ckan/ckan-base:testing-only.2.8 -f 2.8/Dockerfile .
docker build -t ckan/ckan-base:testing-only.2.7 -f 2.7/Dockerfile .
Login to Dockerhub
docker login --username=kowhai
(will then ask for a password)
Push image to (ckan) Dockerhub
docker push ckan/ckan-base:testing-only.2.9
<same with 2.8 and 2.7>