mod: add configuration for key.dir and key.name

main.go

@@ -12,6 +12,8 @@ func createDefaultConfig() {
 	viper.SetDefault("host", "127.0.0.1")
 	viper.SetDefault("port", "8022")
 	viper.SetDefault("users", map[string]string{})
+	viper.SetDefault("key.dir", ".ssh")
+	viper.SetDefault("key.name", "ssh_ed25519_key")
 	viper.SetDefault("app.name", "echo")
 	viper.SetDefault("app.args", []string{"Hello World"})
 }
@@ -58,6 +60,7 @@ func main() {
 	serve.Serve(
 		viper.GetString("host"),
 		viper.GetString("port"),
+		fmt.Sprintf("%s/%s", viper.GetString("key.dir"), viper.GetString("key.name")),
 		viper.GetStringMapString("users"),
 		viper.GetString("app.name"),
 		viper.GetStringSlice("app.args"),