feat(docs/op-stack): Mattie and Tasia comments

docs/op-stack/src/.vuepress/config.js

@@ -155,7 +155,13 @@ module.exports = {
           },    // End of OP Stack hacks
         ],
       },      // End of Building OP Stack Rollups
-      '/docs/contribute.md',
+      {
+        title: "Contributing",
+        collapsable: false,          
+        children: [
+          '/docs/contribute.md',
+        ]        
+      },     
       {
         title: "Security",
         collapsable: false,          

docs/op-stack/src/docs/README.md

 ---
-title: You should not be here
+title: Docs
 lang: en-US
 ---
 

docs/op-stack/src/docs/contribute.md

 ---
-title: Contributing
+title: Contribute to OP Stack
 lang: en-US
 ---