Adding code of conduct.

Author: drvinceknight

_data/menu.yml

@@ -4,6 +4,8 @@
   url: /blog/
 - text: Past Sessions
   url: /sessions.html
+- text: Code of conduct
+  url: /coc.html
 - text: Projects
   url: /projects/
 - text: Inspiration

coc.md

@@ -0,0 +1,14 @@
+---
+layout: page
+title: Code of conduct
+categories: conduct
+---
+
+The first rule of code club is to always be encouraging and helpful.
+
+Code club activities are governed by a formal code of conduct. In short,
+participants at code club events are expected to contribute to an environment
+that is **open** and welcoming, **considerate** and **respectful**.
+
+A fuller statement of these values is given in the [Python Community Code of
+Conduct](https://www.python.org/psf/codeofconduct/).