Connecting React App to Google Cloud

@suntan-superman It’s hard to tell from the snippets you’ve provided, but I suspect your code hasn’t been written to work with Serverless Functions and that you’re running into this:
https://answers.netlify.com/t/support-guide-can-i-run-a-web-server-http-listener-and-or-database-at-netlify/3078

Netlify doesn’t provide runtime Node.js based hosting.

I can see you’re trying to use Express though, so you could read: