Update CI in master branch to include twodfdr and doc building.
Currently we are using https://dev.aao.org.au/datacentral/k8s/twodfdr-jupyterhub/ to build the docs and host them using gitlab pages. Once the binding_dev branch is merged into master, we should look at merging the CI and Docker image building there into master, while preserving the ability to run the regression tests. Ideally we'd also have the tdfio and other twodfdr pytests run in the CI as well.