Update README

README.md

@@ -17,6 +17,12 @@ or, to build the full suite of utilities:
 make bor-all
 ```
 
+Build the beta client:
+
+```shell
+go build -o bor-beta command/*.go
+```
+
 ## License
 
 The go-ethereum library (i.e. all code outside of the `cmd` directory) is licensed under the