Fix offline documentation links (#1116)

diff --git a/app/addons/documentation/components.js b/app/addons/documentation/components.js
index b2fe310..f6cbdd8 100644
--- a/app/addons/documentation/components.js
+++ b/app/addons/documentation/components.js
@@ -11,7 +11,6 @@
 // the License.
 
 import React from "react";
-import Helpers from '../../helpers';
 
 const docLinks = [
   {
@@ -21,7 +20,7 @@
   },
   {
     title: 'CouchDB Official Documentation — Offline',
-    link: Helpers.getServerUrl('/docs/index.html'),
+    link: './docs/index.html',
     iconClassName: 'couchdb-icon'
   },
   {