Moved StrictMode to docs rather than blog post

content/docs/nav.yml

@@ -74,6 +74,8 @@
       title: Accessibility
     - id: code-splitting
       title: Code-Splitting
+    - id: strict-mode
+      title: StrictMode
 - title: Reference
   items:
     - id: react-api

content/blog/2018-02-07-strict-mode.md → content/docs/strict-mode.md

@@ -1,6 +1,7 @@
 ---
+id: strict-mode
 title: StrictMode
-author: [bvaughn]
+permalink: docs/strict-mode.html
 ---
 
 `StrictMode` is a tool for highlighting potential problems in an application. Like `Fragment`, `StrictMode` does not render any visible UI. It activates additional checks and warnings for its descendants.