NXIO-306 Update docker images and remove local build
NXIO-306 build fleetctl in the image
NXIO-306 add comment and fix typo
NXIO-306 fix fleetctl version and remove manager's machine constraint
NXIO-306 remove machine's constraint
NXIO-306 don't build manager image locally
NXIO-306 use quay.io image to run container