This moves the contents of docker/services/README.rst into
deployment/README.rst and updates several sections with recent
architecture changes which also reflect naming changes.
Change-Id: I24dba1ff841da82ceaf80484fda756cafb68db06
To help clarify current and future naming conventions in this directory.
Change-Id: Ib9d24f9844f5aecd47cdd6a47247562dce2092ee
Related-Blueprint: services-yaml-flattening