connect js to main.py

template/index.html

@@ -17,7 +17,7 @@
       <div class="shape"></div>
       <div class="shape"></div>
     </div>
-    <div class="main">
+    <div id="main" class="main">
       <h3>Schedule Generator</h3>
       <label for="input_file">Input File (.csv)</label>
       <input
@@ -85,7 +85,7 @@
       <button id="startBtn" onclick="start()">Generate</button>
     </div>
 
-    <div class="processing">
+    <div id="processing" class="processing">
       <div id="myProgress">
         <div id="myBar"></div>
       </div>