• Run communityserver container, and get onlyoffice.conf from it:
docker run -name communityserver -i -t -d onlyoffice/communityserver`
# wait 1-2 minutes.
sudo docker exec -i -t communityserver /bin/bash -c 'cat /etc/nginx/sites-enabled/onlyoffice' > onlyoffice.conf`
sudo docker rm -fv communityserver