Add basic version of post show page

app/javascript/components/Roadmap/PostList.tsx

@@ -16,6 +16,7 @@ const PostList = ({ posts, boards }: Props) => (
       posts.length > 0 ?
         posts.map((post, i) => (
           <PostListItem
+            id={post.id}
             title={post.title}
             boardName={boards.find(board => board.id === post.board_id).name}
 

app/javascript/components/Roadmap/PostListItem.tsx

@@ -1,12 +1,13 @@
 import * as React from 'react';
 
 interface Props {
+  id: number;
   title: string;
   boardName: string;
 }
 
-const PostListItem = ({title, boardName}: Props) => (
-  <a href="#" className="postLink">
+const PostListItem = ({id, title, boardName}: Props) => (
+  <a href={`/posts/${id}`} className="postLink">
     <div className="postListItem">
       <div className="postTitle">{title}</div>
       <div className="postBoard">{boardName}</div>