Update README.md

README.md

@@ -18,3 +18,14 @@ There are different types of challenges:
 This event will be livestreamed on https://twitch.tv/DerBanko.
 The first events will only be in german (to test it out).
 Consider joining the Discord Server: *WIP*
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+This work is licensed under a
+[Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License][cc-by-nc-sa].
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