update search tearm and parse more data

functions/templating.js

@@ -1,4 +1,7 @@
 export default function parseTemplateString(string, variables) {
-    const searchTerm = /\${([^}]*)}/g; // "${myVariable}"
+    if(!variables || !string) {
+      return string;
+    }
+    const searchTerm = /<<([^>]*)>>/g; // "<<myVariable>>"
     return string.replace(searchTerm, (match, p1) => variables[p1] || '');
 }