Merge pull request #99 from codingthat/add-about

Add the track's about doc

Author: codingthat

docs/ABOUT.md

@@ -1,14 +1,13 @@
 # About
 
-<!-- TODO: write document
+GDScript is a gradually typed, object-oriented, imperative scripting language created for (and is generally used only with) [Godot Engine][godot-engine], an open-source 2D and 3D game engine and IDE.
+As such, it's heavily optimized around Godot's scene-based architecture, and has native support for data types like 
 
-  This document contains a short introduction to the language.
+Since GDScript shares a number with popular languages (for example, its syntax resembles Python), learning GDScript can be a fun gateway to both Godot game programming and to learning other programming languages.
+If you're already interested in Godot and not sure which of its supported languages to learn, you might be interested to read [What is GDScript and why should I use it?][why-use-gdscript].
 
-  The introduction should be relatively brief and touch upon what
-  makes the language interesting (and possibly unique). The goal
-  is to help students decide if they want to join this track.
+If you're curious why Godot created their own language, you can read more at [What were the motivations behind creating GDScript?][why-create-gdscript].
 
-  The contents of this document are displayed on the track page,
-  provided the student has not joined the track.
-
-  See https://exercism.org/docs/building/tracks/docs for more information. -->
+[godot-engine]: https://godotengine.org/
+[why-use-gdscript]: https://docs.godotengine.org/en/stable/about/faq.html#what-is-gdscript-and-why-should-i-use-it
+[why-create-gdscript]: https://docs.godotengine.org/en/stable/about/faq.html#what-were-the-motivations-behind-creating-gdscript