Step 4: Can create containers

index.html

@@ -21,7 +21,12 @@
       <tbody id="containers">
       </tbody>
     </table>
+    <div style="text-align: center">
+      <button type="button" id="create-btn">Create container</button>
+    </div>
     <script>
+      document.getElementById('create-btn').addEventListener("click", () => fetch('/containers', {method: 'POST'}));
+
       fetch('/containers').then(
         (res) => res.json()
       ).then(