> Docker added metadata to describe how to build images; if you want to change the components (AFAICT) the "right" way is to change the metadata and then do a f

> Docker added metadata to describe how to build images; if you want to change the components (AFAICT) the "right" way is to change the metadata and then do a full rebuild. Correct. And Docker implements caching of build layers, so you get the semantics of a full rebuild, but in practice are only rebuilding the interesting parts.