Update README.md with slides from 12/1 workshop

README.md

 # Upcoming 'Git It Together' Workshops
 
-## Dec 1: Using code.ornl.gov
-**Thursday 12/1, 9:00am in JICS Auditorium (5100 RM 128)**
-
-This session will cover
-* accesssing code.ornl.gov using UCAMS or XCAMS
-* adding external collaborators to projects
-* setting up SSH keys for easy pushing and pulling.
- 
-We will also briefly walk through how to apply for an XCAMS account, so that you
-can show your non-ORNL colleagues how to sign up.
-
 ## Dec 22: What is a Merge Request?
 **Thursday 12/22, 9:00am in JICS Auditorium (5100 RM 128)**
 
@@ -27,4 +16,19 @@ for branching are second to none. In this workshop we will cover:
 
 * branching as a means of organized brainstorming
 * syncing branches with gitlab
-* Simple merging of local branhces
\ No newline at end of file
+* Simple merging of local branhces
+
+# Past Workshops
+
+## Dec 1: Using code.ornl.gov
+**Thursday 12/1, 9:00am in JICS Auditorium (5100 RM 128)**
+
+This session will cover
+* accesssing code.ornl.gov using UCAMS or XCAMS
+* adding external collaborators to projects
+* setting up SSH keys for easy pushing and pulling.
+ 
+We will also briefly walk through how to apply for an XCAMS account, so that you
+can show your non-ORNL colleagues how to sign up.
+
+[Slides from this meeting](using-code-ornl-gov/)
\ No newline at end of file