Thanks Jay. Finally got my build to work, well the pod started 
I changed my CI/CD build process to include the db:migrate by using a temporary db.
Does a db:migrate always need to be executed on start up as my image build would be against a dummy db/redis? My current approach is that the db:mirgate and precompile would be performed in an initContainer in my pod.
The discourse/discourse image would be ideal to use if it will be production ready soon.