It's the install size of docker and any container it brings down with it.
Really, I just don't like the idea of being forced to use something massive like docker for a single program.
Just give me a binary and let me set up hardening via systemd - or at least a source tarball or something.
Sincerely: someone who thinks software should not primarily be distributed through docker.
There is no risk of others finding it if you don't turn on federation. It becomes a fully private instance. Just set federation to false.