Hi @imapirate, thank you for your quick reply.
I think it is a real pity that there is no officially supported docker image for erpnext. I would really like to contribute if the project decided to put some efforts in that. However the discussion on that stopped in September 2016:
https://discuss.frappe.io/t/erpnext-docker-discussion/
Did I get you right? Are you trying to build your own docker image for erpnext?