Feat(docs): onion-csr example

README.md

@@ -201,6 +201,10 @@ It can be invoked by running
 
     ./onionmine onion-csr
 
+Example:
+
+    ./onionmine onion-csr -n <nounce> -d /full/path/to/pools/<pool>/candidates/<candidate>
+
 ## Selecting a candidate
 
 It's possible to indicate that a candidate is selected by running the