Help with running Next.js standalone build using server.js in VS Code dev container

[mcollier]

Summary

Hi all,

I'm new to Next.js and currently developing within a VS Code dev container. My goal is to host a Next.js app (with SSR) on Azure Web Apps. To prepare for that, I've set output: "standalone" in my next.config.js.

Running locally with next dev works fine. However, when I build the app using next build and try to run the server with node .next/standalone/server.js, the process starts but seems to hang — it doesn’t respond to requests.

Here’s the preview script I have in my package.json:

"preview": "HOSTNAME=localhost && next build && cp -r public .next/standalone/ && cp -r .next/static .next/standalone/.next/ && node .next/standalone/server.js"

I’ve also explicitly set the HOSTNAME=localhost environment variable. Still, the server doesn’t appear to respond after startup.

Has anyone else run into this? Any suggestions for how to get server.js to start correctly and serve requests in this setup?

Thanks in advance!

Additional information

My devcontainer.json file:


{
  "name": "nextjs-app",
  "image": "mcr.microsoft.com/devcontainers/typescript-node:1-20-bookworm",

  // Features to add to the dev container. More info: https://containers.dev/features.
  "features": {
    "ghcr.io/devcontainers/features/azure-cli:1": {
      "version": "latest",
      "extensions": "azure-devops"
    }
  },

  // Configure tool-specific properties.
  "customizations": {
    "vscode": {
      "extensions": [
        "dbaeumer.vscode-eslint",
        "esbenp.prettier-vscode",
        "yoavbls.pretty-ts-errors",
        "christian-kohler.path-intellisense",
        "ms-azure-devops.azure-pipelines",
        "davidanson.vscode-markdownlint",
        "yzhang.markdown-all-in-one",
        "pomdtr.excalidraw-editor",
        "ms-azuretools.vscode-azure-github-copilot",
        "humao.rest-client",
        "ms-azuretools.vscode-bicep"
      ]
    }
  }
}

Example

No response