`--container-contract` flag must be used for deployments without NNS.
Our current testnet sidechain is like this, for example.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
`morph dump-containers` will dump all containers from the
contaner contract. JSON format is chosen to allow manual intervention.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>