updated README

README.md

@@ -5,6 +5,10 @@ Byzantine Blockchain Consensus
 
 * See: https://github.com/tendermint/tendermint/tree/master/INSTALL
 
+### Fork Tendermint/Testnet
+
+* See: https://github.com/tendermint/tendermint/blob/develop/INSTALL/FORK_TESTNET.md
+
 ### Docker 
 
 * See: https://github.com/tendermint/tendermint/tree/master/DOCKER