use a fixed URL for the merged calendar

server.js

@@ -168,10 +168,15 @@ END:VEVENT
 `;
     });
     icalString += `END:VCALENDAR`;
+    
     fs.writeFileSync(filename, icalString);
 
    // Generate a unique URL for the merged calendar
-   const mergedCalendarUrl = `${req.protocol}://${req.get('host')}/${filename}`;
+   const mergedCalendarUrl = `http://localhost:3000/${filename}`;
+  
+   // Store the merged calendar URL in a file
+   fs.writeFileSync(mergedCalendarUrlFile, mergedCalendarUrl);
+
     console.log(`Merged calendar updated: ${mergedCalendarUrl}`);
 
 
@@ -180,13 +185,19 @@ END:VEVENT
     }
 }
 
-
 // Schedule a cron job to update the merged calendar every hour
 cron.schedule('0 * * * *', () => {
     console.log('Updating merged calendar...');
     updateMergedCalendar();
 });
 
+// serve updated merged calendar to user
+app.get('/merged-calendar', (req, res) => {
+    const mergedCalendarUrlFile = 'merged_calendar_url.txt';
+    const mergedCalendarUrl = fs.readFileSync(mergedCalendarUrlFile, 'utf8');
+    res.redirect(mergedCalendarUrl);
+  });
+
 // Start the server
 const port = 3000;
 app.listen(port, () => {