To run storage node at dev-env environment it should have
configurable parameters. To keep `cfg` structures we can
read configuration from env and yml config file with viper
and parse values such as script hashes, fees, keys into
`cfg` structures.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Adds accounting Service implementation that verifiers request signatures and
signs responses from internal Service.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
