Hello,
I'm wondering how hard it would be to implement a free web dwg viewer (e.g. https://a360.autodesk.com/viewer/widget/) to OC.
Wkr,
Sounds like a rather simple ownCloud app. https://doc.owncloud.org/server/10.0/developer_manual/app/ for a start. Any questions let us know. We do plan a workshop at the ownCloud Conference in September as well.