Update README.md (stratisproject#3774)

Author: dangershony

Diff for: README.md

@@ -60,7 +60,8 @@ Sidechains, Private/Permissioned blockchain, Compiled Smart Contracts, NTumbleBi
 Running a FullNode
 ------------------
 
-Our full node is currently in alpha.  
+The master branch is actively developed and regularly committed to, and it can become unstable.  
+To compile a stable (production) release use any of the release tags form version 3.0.x.x and upwards.  
 
 ```
 git clone https://github.com/stratisproject/StratisBitcoinFullNode.git