I will create a Shopify App with Nextjs.
According to my research, Heroku is only way to host the shopify app.
Is there any way to do Hosting in vercel with latest Nextjs version using SSR by vercel’s cloud function?
I am facing a similar problem. I found this page that might help. I have not yet tried it but it might be just what you need.
https://maxrozen.com/deploying-node-react-shopify-apps-on-vercel