feat: accept arguments through ssh command arguments

Configured default arguments are replaced with provided arguments
through the `ssh` command. Without any arguments the default arguments
are used instead.

internal/serve/serve.go

@@ -55,6 +55,10 @@ func setupSshServer(host string, port string, host_key_path string, users map[st
 		wish.WithMiddleware(
 			func(next ssh.Handler) ssh.Handler {
 				return func(s ssh.Session) {
+					provided_args := s.Command()
+					if len(provided_args) > 0 {
+						args = provided_args
+					}
 					cmd := wish.Command(s, name, args...)
 					if err := cmd.Run(); err != nil {
 						wish.Fatalln(s, err)