Add Node 18 to nodeVersions

Author: todeveni

utils/README.blueprint.md

@@ -17,7 +17,7 @@ This repository contains a set of developer-friendly, general purpose PHP images
 ## Images
 
 {{ $versions := list "8.1" "8.0" "7.4" "7.3" "7.2" }}
-{{ $nodeVersions := list "10" "12" "14" "16" }}
+{{ $nodeVersions := list "10" "12" "14" "16" "18" }}
 
 | Name                                                                    | PHP version                  | type |variant | NodeJS version  | Size 
 |-------------------------------------------------------------------------|------------------------------|------|--------|-----------------|------