docker-compose - use logging limits (#66) ...

- ldap sync is very noisy, limits/rotation required
 - can be verified with
   docker inspect -f '{{.HostConfig.LogConfig}}' 88…de
   {json-file map[max-file:3 max-size:10m]}

Co-authored-by: Markus Koetter <[email protected]>

WIP: smaller docker image

user dockerhub for image building and travis-ci for testing

user dockerhub for image building and travis-ci for testing

wip: docker and travis