Documents providing an SSHD port in deployNodes (#3341)

docs/source/generating-a-node.rst

@@ -43,6 +43,8 @@ in the `Kotlin CorDapp Template <https://github.com/corda/cordapp-template-kotli
             }
             // No webport property, so no webserver will be created.
             h2Port   10004
+            // Starts an internal SSH server providing a management shell on the node.
+            sshdPort 2223
             // Includes the corda-finance CorDapp on our node.
             cordapps = ["net.corda:corda-finance:$corda_release_version"]
             // Specify a JVM argument to be used when running the node (in this case, extra heap size).