Minor fixes and improvements.
Full changelog
52200a7c Fix for missing wallpaper files in the release bundle.
eafab968 Fix for broken UserUpdate.
d20d77de Unused/unneeded code removed.
e5bab82f Docker: added healthchecks, updated versions.
08f32773 removed debug logging, test fixes
Full Changelog: https://github.com/tinode/chat/compare/v0.25.0...v0.25.1