Use 'order' property for ordering

Author: sevanspowell

docs/code/Flakes/Tutorials/Hacking.md

@@ -1,6 +1,7 @@
 ---
-title: 03-Create a Development Environment
+title: Create a Development Environment
 date: 2021-02-09
+order: 3
 ---
 
 ## Hacking

docs/code/Flakes/Tutorials/Installation.md

@@ -1,6 +1,7 @@
 ---
-title: 01-Installation
+title: Installation
 date: 2021-02-09
+order: 1
 ---
 
 Presuming nix is already installed, Nix flakes are available from Nix version 2.4 and up.

docs/code/Flakes/Tutorials/NewProject.md

@@ -1,6 +1,7 @@
 ---
-title: 02-Create a New Flakes Project
+title: Create a New Flakes Project
 date: 2021-02-09
+order: 2
 ---
 
 ## Creating an example project