[tikwidd]

Next.js or a create-react-app project for the frontend, which you can host for free on Azure Static Web Apps.

Azure functions or Google Firebase for the backend.

With this approach you might not need to pay a cent depending on your usage, plus you can take advantage of the large ecosystem of React components. For a "non-serverless" approach, I would set up a VM on Linode and use docker-compose behind nginx.

[pjgalbraith]

I would also consider using Cloudflare Workers for the backend and for the static site hosting if it is a simple enough app.