[gjs: 2/8] add a few links and subsections to Reading Material

[Philip Chimento <pchimento src gnome org>]

commit 0078f93dbb32187b50812efd0133b15e00f809bc
Author: Andy Holmes <andrew g r holmes gmail com>
Date:   Wed Apr 25 00:49:11 2018 +0000

    add a few links and subsections to Reading Material

 doc/HackingBeta.md | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/doc/HackingBeta.md b/doc/HackingBeta.md
index 96d2c214..ef640021 100644
--- a/doc/HackingBeta.md
+++ b/doc/HackingBeta.md
@@ -25,8 +25,15 @@ TBA
 
 ## Reading material
 
+### JavaScript & SpiderMonkey
+
 * TBA
 
+### Gnome Contribution
+
+* https://wiki.gnome.org/GitLab
+* https://wiki.gnome.org/Newcomers/
+
 ## Walkthroughs
 
 * TBA