Webpack now bundling all our app code

- We use import/export to indicate dependencies
- Webpack makes sure everything loads in the correct order
- We can remove all our additional script tags in index.html

index.html

@@ -39,10 +39,5 @@
     </div>
     <img src="./assets/webpack.svg" />
   </body>
-  <script src="./src/app/alert.service.js"></script>
-  <script src="./src/app/component.service.js"></script>
-  <script src="./src/app/utils/inputs-are-valid.js"></script>
-  <script src="./src/app/utils/parse-inputs.js"></script>
-  <script src="./src/app/app.js"></script>
   <script src="./dist/main.js"></script>
 </html>