python_module_name for web app

{{cookiecutter.out_dir}}/web/index.html

@@ -40,7 +40,7 @@
   <script>
     var webRenderer = "{{ cookiecutter.web_renderer }}";
     var useColorEmoji = "{{ cookiecutter.use_color_emoji }}" == "true";
-    var pythonModuleName = "main";
+    var pythonModuleName = "{{ cookiecutter.python_module_name }}";
   </script>
 
   <script src="python.js"></script>