docs: Add licence info to Readme (#14)

README.md

@@ -1,3 +1,20 @@
 # codeforlife-sso
 
 This repo contains CFL's Single Sign-On (SSO) service. This will be responsible for authenticating users.
+
+## LICENCE
+In accordance with the [Terms of Use](https://www.codeforlife.education/terms#terms)
+of the Code for Life website, all copyright, trademarks, and other
+intellectual property rights in and relating to Code for Life (including all
+content of the Code for Life website, the Rapid Router application, the
+Kurono application, related software (including any drawn and/or animated
+avatars, whether or not such avatars have any modifications) and any other
+games, applications or any other content that we make available from time to
+time) are owned by Ocado Innovation Limited.
+
+The source code of the Code for Life portal, the Rapid Router application
+and the Kurono/aimmo application are [licensed under the GNU Affero General
+Public License](https://github.com/ocadotechnology/codeforlife-workspace/blob/main/LICENSE.md).
+All other assets including images, logos, sounds etc., are not covered by
+this licence and no-one may copy, modify, distribute, show in public or
+create any derivative work from these assets.