Updated both install and update scripts to use the setup_nodejs function with NODE_MODULE for Verdaccio installation and upgrade. Improved update process to include apt update/upgrade steps, and standardized apt cleanup commands in the install script.
- Change credentials from 'Create via CLI' to null
- Remove redundant informational notes
- Move config and storage from /etc and /var/lib to /opt
- Remove custom update script (use built-in)
- Update source URL to ProxmoxVED
- Switch to Debian 13 (Trixie)