Modify and document the way to generate a DCP by package_id.
Update the source code of the container manager to align with.
Signed-off-by: Isaac Hermida <isaac.hermida@digi.com>
Rename the files/references as follow:
dey-image-container-manager ---> dey-image-containers
dey-image-containers ---> dey-image-dcp
Signed-off-by: Francisco Gil <francisco.gilmartinez@digi.com>