Fix Library ? Docker + Next.js
Docker + Next.js troubleshooting

Fix Docker Next.js Standalone Build Failed

Next.js standalone Docker builds require output: standalone and correct COPY paths. Most failures come from copying .next files that were never generated.

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Common symptoms

  • Docker build cannot find .next/standalone.
  • Container starts but static assets are missing.
  • Local next build works outside Docker.

What to check first

Platform: Docker + Next.js
Error: Standalone build failed

Next.js standalone Docker builds require output: standalone and correct COPY paths. Most failures come from copying .next files that were never generated.

Step-by-step fix

  1. Set output: standalone in next.config.js.
  2. Run npm run build inside the builder stage.
  3. Copy .next/standalone, .next/static, and public into the runner image.
  4. Test docker build locally before pushing.
// next.config.js
module.exports = { output: "standalone" }

Common mistake to avoid

Do not copy only .next/standalone and forget .next/static or public assets.

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