feat: add home page for available routes

lib/core/devEntry.js

@@ -15,12 +15,31 @@ const renderDocs = props => {
   return <Docs content={metadata.content} {...props} />;
 };
 
+const Home = () => {
+  const showLink = path => (
+    <li>
+      <Link to={path}>{path}</Link>
+    </li>
+  );
+  const blogLinks = blogMetadata.map(blog => showLink(blog.path));
+  const docsLinks = docsMetadata.map(doc => showLink(doc.path));
+
+  return (
+    <ul>
+      {'Available Routes'}
+      {blogLinks}
+      {docsLinks}
+    </ul>
+  );
+};
+
 class App extends React.Component {
   render() {
     return (
       <BrowserRouter>
         <div>
           <Switch>
+            <Route exact path="/" component={Home} />
             {blogMetadata.map(({path, content}) => (
               <Route key={path} exact path={path} render={renderBlog} />
             ))}