add chapters and deploy script

server.js

@@ -55,9 +55,18 @@ app.post('/api/check-answer', (req, res) => {
   const correctAnswer = parseInt(task.answer);
   const isCorrect = userAnswer === correctAnswer;
   
-  // Speichere Antwort und isCorrect in der Task
+  // Initialisiere attempts Counter falls nicht vorhanden
+  if (tasks[taskIndex].attempts === undefined) {
+    tasks[taskIndex].attempts = 0;
+  }
+  
+  // Erhöhe Versuchszähler bei jeder Antwortprüfung
+  tasks[taskIndex].attempts += 1;
+  
+  // Speichere Antwort, isCorrect und Timestamp in der Task
   tasks[taskIndex].userAnswer = userAnswer;
   tasks[taskIndex].isCorrect = isCorrect;
+  tasks[taskIndex].answerTimestamp = new Date().toISOString();
   saveTasks(tasks);
   
   res.json({