added builder script

_builder/extends-new.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Define the content to write to the file
+file_content=$(cat <<EOF
+version: '3.4'
+
+services:
+  $BLDR_APP:
+    extends:
+      file: \${COOKBOOK}/$BLDR_APP/docker-compose.yml
+      service: $BLDR_APP
+EOF
+)
+
+# Output the content to a file
+BLDR_NEW_SE="$file_content" 
+
+echo "***** Sample Extends *****"
+echo "$BLDR_NEW_SE"