fix: copy frontend/browserslist into Docker build context

[gugu]

Without this file present in /app/frontend during the production build, Angular falls back to the default browserslist (broader, older browser targets), which forces extra transpilation and inflates the initial bundle past the 5MB budget. Copying the committed browserslist preserves the intended modern targets and keeps the bundle within budget.

Summary by CodeRabbit

• Chores
  • Updated Docker build configuration to optimize build layer caching, improving build efficiency for development and deployment pipelines.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 2ccd4819-9fc1-4b70-856a-322ba8c40d30

📥 Commits

Reviewing files that changed from the base of the PR and between 7398468 and 25c698e.

📒 Files selected for processing (1)

• Dockerfile

📝 Walkthrough

Walkthrough

The Dockerfile's front_builder stage is updated to copy frontend/browserslist into the build context alongside existing frontend dependency configuration files. This ensures the Docker layer cache invalidates when browserslist configuration changes.

Changes

Frontend build configuration

Layer / File(s)	Summary
Add browserslist to Docker copy instruction Dockerfile	The front_builder stage COPY command now includes frontend/browserslist alongside existing manifest, yarn, tsconfig, and angular config files to ensure layer cache invalidation.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A browserslist, small yet keen,
Now joins the Docker build scene,
Cache will freshen when it's changed,
Browser targets all arranged,
One line makes the build more sound! 🐰

🚥 Pre-merge checks | ✅ 6

✅ Passed checks (6 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the main change: copying the frontend/browserslist file into the Docker build context, which directly addresses the bundle size issue mentioned in the PR objectives.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Security Check	✅ Passed	PR adds browserslist config file to Docker build. File is plain-text with browser queries only, non-executable, no code/secrets/injection risks. No privilege escalation or security control changes.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/dockerfile-copy-browserslist

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[Copilot]

Pull request overview

This PR ensures Angular’s production build uses the repository’s intended browser targets by including frontend/browserslist in the Docker build context, preventing fallback to Angular’s default targets that can increase transpilation and inflate bundle size.

Changes:

• Copy frontend/browserslist into /app/frontend/ during the front_builder stage to preserve modern browser targets during production builds.

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