feat(setup): Add --force update flag to setup script and update installation instructions

readme.md

@@ -227,8 +227,15 @@ sudo nupst update
 This will:
 1. Pull the latest changes from the git repository
 2. Run the installation scripts
-3. Refresh the systemd service configuration
-4. Restart the service if it was running
+3. Force-update Node.js and all dependencies, even if they already exist
+4. Refresh the systemd service configuration
+5. Restart the service if it was running
+
+You can also manually run the setup script with the force flag to update Node.js and dependencies without updating the application code:
+
+```bash
+bash setup.sh --force
+```
 
 ## Security