Proper way to start digibyted in upstart

digibyted.conf

description "digibyted"

start on filesystem
stop on runlevel [!2345]
oom score -500
expect fork
respawn
respawn limit 10 60 # 10 times in 60 seconds

script
user=root
home=/$user
cmd=/var/digibyte/digibyted
daemon_opts="-conf=/var/digibyte/digibyte.conf -datadir=/var/digibyte/data"
exec $cmd $daemon_opts
end script
pre-stop script
exec /var/digibyte/digibyte-cli $daemon_opts stop
end script