How to integrate ONLYOFFICE Docs with draw.io/diagrams.net

ONLYOFFICE Docs is an open-source office suite distributed under GNU AGPL v3.0. It comprises web-based viewers and collaborative editors for text documents, spreadsheets, and presentations compatible with OOXML formats. In this tutorial, we’ll learn how to make the draw.io service available right in ONLYOFFICE Docs using a plugin.