Update COPYING

Change-Id: I22661254b16840bcea7b352d51171a232fa7041a
diff --git a/COPYING b/COPYING
index a8c79dd..590d418 100644
--- a/COPYING
+++ b/COPYING
@@ -1,4 +1,10 @@
-Copyright 2018 Serge Bazanski
+The contents of the hscloud repository are, unless stated otherwise in respestive files or subdirectories, distributed under the ISC License. To find all authors of the code for the purposes of copyright, please consult the repository's Git history or run the following command:
+
+    git log --pretty=format:"%an" | sort | uniq
+
+ISC License:
+
+Copyright 2018-2020 HSCloud Authors
 
 Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.