This one (docker image) should work:
https://hub.docker.com/r/lsioarmhf/cops/
First
Code:
docker pull lsioarmhf/cops
then follow the explanation in the url.
Code:
docker create \
--name=cops \
-v <path to data>:/config \
-v <path to data>:/books \
-e PGID=<gid> -e PUID=<uid> \
-e TZ=<timezone> \
-p 80:80 \
lsioarmhf/cops
then
Success!