Update static/index.html

static/index.html

@@ -25,6 +25,7 @@
         <form id="fileUploadForm">
             <label class="form-label" for="customFile">Default file input example</label>
             <input type="file" class="form-control" name="fileUpload" id="fileUpload" />
+            <button class="btn btn-primary" type="submit">Submit</button>
         </form>
     </div>