If your app is a PHP or HTML/JS app, you probably should use the `Custom Webapp`, also know as `my_webapp`, in order to configure nginx, php, mysql, YunoHost permission and backup for you.
To expose the app on the web through nginx and be able to manage access permissions to the webapp, you could use the [`redirect` app](https://github.com/YunoHost-Apps/redirect_ynh/) to create a nginx reverse proxy on your local ip/port running the service.
You probably should create custom backup and restore hooks to integrate your app to your YunoHost backup/restore process. See [Backup and restore hooks](/packaging_apps_hooks#backup-restore)