Upgrading pleroma background

src/freedombone-utils-gnusocialtools

         if [ -f /var/www/${domain_name}/htdocs/static/logo.png ]; then
             cp /var/www/${domain_name}/htdocs/static/logo.png /var/www/${domain_name}/htdocs/static/logo.png.old
         fi
+        if [ -f /var/www/${domain_name}/htdocs/static/bg.jpg ]; then
+            cp /var/www/${domain_name}/htdocs/static/bg.jpg /var/www/${domain_name}/htdocs/static/bg.jpg.old
+        fi
         if [ -f /var/www/${domain_name}/htdocs/static/config.json ]; then
             cp /var/www/${domain_name}/htdocs/static/config.json /var/www/${domain_name}/htdocs/static/config.json.old
         fi
         if [ -f /var/www/${domain_name}/htdocs/static/logo.png.old ]; then
             cp /var/www/${domain_name}/htdocs/static/logo.png.old /var/www/${domain_name}/htdocs/static/logo.png
         fi
+        if [ -f /var/www/${domain_name}/htdocs/static/bg.jpg.old ]; then
+            cp /var/www/${domain_name}/htdocs/static/bg.jpg.old /var/www/${domain_name}/htdocs/static/bg.jpg
+        fi
 
         if [ -f /var/www/${domain_name}/htdocs/index.php ]; then
             mv /var/www/${domain_name}/htdocs/index.php /var/www/${domain_name}/htdocs/index_qvitter.php