So, officially no. But there are ongoing theories in the r/emulationonandroid subreddit that they are.
I think it could be either way, but it’s unlikely that they are the same person. In both cases, harassment caused them to shut there projects down, which could be a reasanobale coincidence, or could be indicative of a larger harassment campaign.
No, I think if you’re using the nextcloud all in one image, then the management image connects to the docker socket and deploys nextcloud using that. The you could be able to update nextcloud via the web ui.
https://github.com/nextcloud/all-in-one?tab=readme-ov-file#how-to-update-the-containers