I need to create a healthcare management software for a local blood bank whose branches are spread throughout the USA. The Client has set the condition to use inter systems as the database management.

I am looking to create the app using PHP language and then host it through with VPN so that they all are interconnected. But due to the raise in cyber attacks. The client is seriously concerned about the security of the app thus wants to host it on google dedicated server which is being powered by cloudways.com/en/managed-google-compute-engine.php.