Update script.js

static/script.js

@@ -51,7 +51,8 @@ function updateSliderValue(value) {
 }
 
 function startQuiz() {
-    socket.emit('start_quiz');
+    const startQuestion = parseInt(document.getElementById('start-question-number').value, 10);
+    socket.emit('start_quiz', { start_question: startQuestion });
 }
 
 function checkAnswers() {