Contract v1 en (#275)

* feat: #WEB-14301 add index.html

* feat: redirect in layout

* fix: update redirect URL in layout to point to futures update log

---------

Co-authored-by: lizzie <lizzie.z@mexc.com>

Author: Lizzie37000

source/layouts/layout.erb

@@ -29,9 +29,9 @@ under the License.
     <meta charset="utf-8">
     <meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
-    <meta http-equiv="refresh" content="0; url=https://www.mexc.com/api-docs/spot-v3/introduction">
+    <meta http-equiv="refresh" content="0; url=https://www.mexc.com/api-docs/futures/update-log">
     <script type="text/javascript">
-     window.location.href = "https://www.mexc.com/api-docs/spot-v3/introduction";
+     window.location.href = "https://www.mexc.com/api-docs/futures/update-log";
     </script>
 
     <% if current_page.data.key?('meta') %>