create a new iCalendar instance

server.js

@@ -63,6 +63,9 @@ app.post('/merge', async (req, res) => {
         // Filter out any failed requests
         const validResults = results.filter((result) => result !== null);
 
+        // Create a new iCalendar instance
+        const calendar = icalGenerator({ name: linkGroupName });
+
         // Parse calendar data
         const mergedCal = [];
         validResults.forEach((result) => {