Deployed a Next.js application to App Engine Standard [Nodejs] and got a 500 error

Question

I deployed to app engine with nodejs8 runtime and got a 500. Im deploying a next.js application, and upon reviewing StackDriver I get. It appears .next might be getting ignored.

Answer 1

I've just managed to make it work. Here's what I found:

First of all, it doesn't work with Yarn. It seems gcp-build command does not run when there is yarn.lock file.

Now in package.json, use following scripts:

  "scripts": {
    "gcp-build": "next build",
    "start": "next start -p $PORT"
  }

And make sure to declare Next and all modules needed in next.config.js as dependencies (not devDependencies)

FYI I only have runtime: nodejs10 in my app.yaml and only scripts I have are in pages folder and next.config.js