docker run -v /srv/dashing:/config/dashing-icinga -p 3030 wohlben/dashing-icinga
this copies the whole dashing-icinga folder to /srv/dashing, where you'll be able
to edit the config.ru with your icinga1.9 FQDN and login information
you could delete all files but the config.ru after the initial start and mount
only that on start.
docker run -p 3030 \ -v /srv/dashing/config.ru:/config/dashing-icinga/config.ru wohlben/dashing-icinga