Help to create docker-compose file for OCIS/Onlyoffice

The result I’m looking to achieve is the integration of the onlyoffice suite into owncloud. This enables compatible document viewing and editing.
All the tutorials that explain how to achieve this talk about a WOPI server that’s supposed to link the two.
For the moment I’ve managed to get OCIS and onlyoffice to work separately, but I can’t find any documentation that allows me to achieve the desired result without Traeffik and without adding other modules which in my case are not necessary.
I just want to have ocis and onlyoffice in the simplest and most concise way.