Howto for installing/integrating Onlyoffice

I must not be searching on the right terms. Is there a howto for installing an Onlyoffice docker container and integrating it with Nextcloud? I’m running 19.0.3. I have Docker running on a separate VM and would like to install Onlyoffice there.

ummm… OO should be kind of integrated to NC 18+… no dockers needed anymore.
just install community document server and then this connecting app. and that’s it.