added check for at least one serverName

.vscode/numbered-bookmarks.json

@@ -12,7 +12,7 @@
 				-1,
 				-1,
 				-1,
-				110
+				115
 			]
 		}
 	]

setup.sh

@@ -92,7 +92,12 @@ while true; do
     read -p "What hostnames should this server answer to? " inputServerName
     case "${inputServerName}" in
         '')
+            # check that at least one name as been provided
+            if [ -z "${serverNames_working}" ]; then
+                echo -e "\n${err}You must provide at least one hostname${norm}"
+            else
                 break
+            fi
             ;;
         [Xx]*)
             echo -e "\n${cyan}---exiting---\n${norm}"