if you have the issue that you get nothing and in the dockerlogs appears:
File [/usr/share/loolwsd//loleaflet/1.9.6/loleaflet.html] does not exist.
enter into the image with
docker exec -it <process-id> /bin/bash
switch to:
cd /usr/share/loolwsd/loleaflet
and add the link:
/usr/share/loolwsd/loleaflet# ln -s dist 1.9.6
thats it.