docker image instructions for Indelible: https://github.com/eugenegardner/indelible/tree/master
Images available in Dockerhub: https://hub.docker.com/repository/docker/mercury/indelible
A singularity image can also be made by converting a dockerhub image:
cf. make_singularity_image.sh
build https://github.com/HurlesGroupSanger/indelible/tree/23a1424f2b3e55c00e14de59c253771e03c2171f