Enhance SSH configuration in setup script with safer settings and backup restoration. Add recovery instructions for broken SSH service to README. Improve logging and error handling during SSH service restart.

README.md

@@ -233,6 +233,18 @@ Take a system snapshot before running the script if running on a virtual machine
 3. Check SSH client configuration
 4. Use verbose mode: `ssh -v sysadmin@server-ip`
 
+### SSH Service Broken
+If the setup script breaks SSH service, you can recover:
+1. Access the server via console (not SSH)
+2. Download the recovery script:
+   ```bash
+   wget -O fix-ssh.sh "https://del-c.net/deb12-fix"
+   chmod +x fix-ssh.sh
+   su -
+   ./fix-ssh.sh
+   ```
+3. The script will restore from backup or create a basic working configuration
+
 ### Firewall Issues
 1. Check UFW status: `sudo ufw status`
 2. Verify port 22 is allowed: `sudo ufw status numbered`