fix(frontend): copy Next.js export from out/ not dist/ in Docker build

[Kingvic300]

Summary

The frontend is Next.js with output: 'export' (next.config.ts), which emits the static site to out/. The Docker build copied /app/dist — a path next build never produces — so the nginx image was built with an empty/incorrect web root.

Changes

• COPY --from=builder /app/out /usr/share/nginx/html in frontend/Dockerfile.

This matches the root package.json build script, which already references frontend/out/*.

Testing

• Path-only change; verified against next.config.ts (output: 'export').

Closes #40

Summary by CodeRabbit

• Chores
  • Updated Docker build configuration to properly align with Next.js static export output handling for improved deployment consistency.

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Project	Deployment	Actions	Updated (UTC)
txio	Ready	Preview, Comment	Jun 7, 2026 11:44am

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 8162c159-32a4-452a-a16c-11594d8289b0

📥 Commits

Reviewing files that changed from the base of the PR and between 74b9e4b and b4a9f0c.

📒 Files selected for processing (1)

• frontend/Dockerfile

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📝 Walkthrough

Walkthrough

The Dockerfile's static content source is corrected from a non-existent dist directory to the actual Next.js export output directory out. A comment clarifies the path for future maintainers.

Changes

Next.js Static Export Path in Dockerfile

Layer / File(s)	Summary
Dockerfile output path correction frontend/Dockerfile	The COPY instruction now targets /app/out (the Next.js export output directory) instead of /app/dist, with an added comment documenting the correct path.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A rabbit hops through Docker files with glee,
/out not /dist is where exports be! 🐰📦
The build will now work, fast and clean,
Static exports serve the frontend scene.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and clearly describes the main change: fixing the Docker build to copy Next.js export from the correct 'out/' directory instead of the non-existent 'dist/' directory.
Linked Issues check	✅ Passed	The pull request fulfills the primary objective of issue #40: correcting the Dockerfile to copy from /app/out into the nginx webroot, aligning with Next.js's 'export' output configuration.
Out of Scope Changes check	✅ Passed	All changes are directly related to resolving issue #40; the Dockerfile modification and comment addition are appropriately scoped to fixing the Docker build path.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/40-frontend-docker-out

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