How To Have Public Url's For My Embeded Node Js App

Hello,

I developed a custom embedded Node js app to calculate shipping rates, and I tested it with ngrok public Url’s, everything is fine, the only thing left for me is how my app will continue working after the ngrok server is shut.

how i can have public Url’s for my app and my custom endpoints used to calculate rates.

Ragards.

Yazid.