Update:
I was able to get it working with a self-signed certificate and the functionality is great. I had NC connected to the OO server with https://localip That worked fine but once left my LAN, from the web it tried to resolve the local ip. That of course will not work and it does zero good to only work while you are on the LAN. I was unsuccessful at getting the self-signed cert to work behind nginx reverse proxy.
Is it possible to just have nginx forward http to the OO server and: