I don't mean to add to the discourse here or to keep giving you hypotheticals but, while learning to self host is fun and cool, you really do not want this thing on public Internet. Even if you can delete files to prevent uncouth things, what if someone uploads something while you're asleep, or away from your computer? Do you have others monitoring the instance to take down CSAM or other illegal material? What if someone uploads malware and it executes on your machine? If you must leave it exposed, you should allow only family and friends to access via a strongly passworded account(I think that is configurable with copy party).

If you really want to expose services, try a media server like Plex or Jellyfin. You don't want strangers to upload things to your machines.