Add copyparty file server with full integration

- Configure copyparty file server with user authentication
- Set up multi-volume structure (shared, documents, music, videos, private)
- Create systemd service for automatic startup
- Add Nginx reverse proxy integration on /cloud/ path
- Update documentation with complete setup and management guide
- Mark Gitea and file server tasks as completed in TODO

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

config/systemd/copyparty.service

@@ -0,0 +1,42 @@
+# DEPLOYMENT LOCATION: /etc/systemd/system/copyparty.service
+# Deploy with: sudo cp config/systemd/copyparty.service /etc/systemd/system/
+# Enable with: sudo systemctl daemon-reload && sudo systemctl enable --now copyparty
+
+[Unit]
+Description=copyparty file server
+After=network.target
+
+[Service]
+Type=simple
+SyslogIdentifier=copyparty
+Environment=PYTHONUNBUFFERED=x
+ExecReload=/bin/kill -s USR1 $MAINPID
+Restart=always
+RestartSec=5
+
+# Run as hoborg user with existing configuration
+User=hoborg
+Group=hoborg
+WorkingDirectory=/home/hoborg
+Environment=XDG_CONFIG_HOME=/home/hoborg/.config
+
+# Use copyparty with config file
+ExecStart=/usr/bin/copyparty -c /home/hoborg/.config/copyparty/copyparty.conf
+
+# Some basic hardening
+MemoryMax=25%
+ProtectClock=true
+ProtectControlGroups=true
+ProtectHostname=true
+ProtectKernelLogs=true
+ProtectKernelModules=true
+ProtectKernelTunables=true
+RestrictNamespaces=true
+RestrictRealtime=true
+RestrictSUIDSGID=true
+
+# Allow access to home directories
+ProtectHome=false
+
+[Install]
+WantedBy=multi-user.target