Update navigation header to include link to Commerce devdocs index page

Author: bdenham

gatsby-config.js

@@ -14,9 +14,13 @@ const { pages, subPages } = require("./src/data/navigation");
 
 module.exports = {
   siteMetadata: {
+    "home": {
+      "title": "Commerce",
+      "path": "/commerce/docs"
+    },
     pages: pages,
     subPages: subPages,
   },
   plugins: [`@adobe/gatsby-theme-aio`],
   pathPrefix: process.env.PATH_PREFIX || '/commerce/testing/'
-};
+};

src/data/navigation/header.js

@@ -1,6 +1,6 @@
 module.exports = [
     {
-      title: "Commerce Testing",
+      title: "Testing",
       path: "/",
     },
     {