Terminology for different types of images

[bkabrda]

Since I've started working with Nulecule, I've been hitting this problem - there are basically 2 types of images one needs to speak of:

• "meta images" - the images that contain the orchestration info
• "binary images" - the images that contain the actual services that make up the application

Since these two types are not distinguished by Nulecule docs, it's kind of necessary to agree on these prior to every discussion and people sometimes call them differently, which is confusing.
I'd like to propose that the names of these two image types are standardized, so that it's clear what people talk about (not sure if "meta images" and "binary images" are a good candidates, but so far most people I talked to have been using these).