Add more docs for NN ops

dragon/README.md

@@ -0,0 +1,16 @@
+# Hush dragon
+
+This is SilentDragon's cousin, dragon! They are very loud and spit DPoW fire from HUSH all the way to BTC mainnet.
+
+# What does Hush dragon do?
+
+Hush dragon performs notarizations, which protects HUSH and other chains from mining-based attacks, most notably
+double spend attacks.
+
+# License
+
+GPLv3
+
+# Copyright
+
+See AUTHORS in the main directory of this repo.