Update command usage and documentation

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/reference/commandline/stack_deploy.md

@@ -27,6 +27,9 @@ Options:
       --bundle-file string    Path to a Distributed Application Bundle file
   -c, --compose-file strings  Path to a Compose file
       --help                  Print usage
+      --kubeconfig string     Kubernetes config file
+      --namespace string      Kubernetes namespace to use
+      --orchestrator string   Orchestrator to use (swarm|kubernetes|all)
       --prune                 Prune services that are no longer referenced
       --resolve-image string  Query the registry to resolve image digest and supported platforms
                               ("always"|"changed"|"never") (default "always")