Further to 355cf9483c which caught some
of these. This should fix the remainder in the contributing docs.
Signed-off-by: Brett Randall <javabrett@gmail.com>
This largely removes references to Docker where possible.
The HOWTO guides are still Docker docs and refer to Docker not
moby, so the next step is to rework these as Moby docs and put
them in `docs/` in this repo.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
