soft-launch the program structure post

_layouts/home.html

@@ -5,6 +5,7 @@ layout: default
 {%- if site.posts.size > 0 -%}
 <ul id="posts-list">
   {%- for post in site.posts -%}
+  {%- if post.hide -%}{%- continue -%}{%- endif -%}
   <li>
     <h2>
       <a href="{{ post.url | relative_url }}">

_posts/2019-08-02-program-structure-and-composability.md

@@ -4,6 +4,7 @@ title: >-
 description: >-
     Discussing the nature of program structure, the problems presented by
     complex structures, and a pattern which helps in solving those problems.
+hide: true
 ---
 
 ## Part 0: Introduction