There's only one image of the free community edition OpenKM 6.3.2 right now.
A database creation will be triggered if only a volume directory is empty.
To run:
docker run -dti \
--name openkm \
-v /srv/openkm/repository:/opt/openkm/repository \
-p 8080:8080 \
obviouscap/openkm
and access:
http://docker_host_ip:8080/
Default credential user: okmAdmin password: admin