This is a simple repo with information on the a docker-compose.yml to run ownCloud with an Nginx proxy and LetsEncrypt using Docker, as I was able to find anything that did everything I needed based on the official documentation from ownCloud and kept separate volumes for data.
Information sources
This is consolidated based on information from the following places and thanks to them:
Change the hostname variables above and in the docker-compose.yml file as necessary specifically the variables in the owncloud service environment block: