added React Router's Link

Home.js.diff

 import React from 'react';
+import { Link } from 'react-router-dom';
 import { createClient } from 'contentful';
 
 class Home extends React.Component {
 
     return this.state.posts.map(post => {
       console.log(post);
-      return <p>Post</p>;
+      return (
+        <Link key={post.sys.id} to={`post/${post.sys.id}/`}>
+          {post.fields.title}
+        </Link>
+      );
     });
   }
 }