feat: fix arka backend docker

[sankhavaramsaitulasiram]

Description

Types of changes

What types of changes does your code introduce?

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Other (please describe):

Further comments (optional)

Summary by CodeRabbit

• Chores
  • Improved Docker build process to ensure proper configuration file handling during image building.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

A build-time step is added to the backend/Dockerfile that copies config.json.default to config.json in the builder stage, preceding the build command execution.

Changes

Cohort / File(s)	Summary
Docker Build Configuration backend/Dockerfile	Adds a COPY instruction in the builder stage to initialize config.json from config.json.default before the build command executes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• feat: migrate to bun in github workflows #231: Implements the same build-time config materialization approach but as a CI workflow command step rather than a Dockerfile instruction.

Suggested reviewers

• vignesha22

Poem

🐰 A hop, a skip, and a Docker build,
Copy config from default, the step is filled,
No more missing files to haunt the night,
The builder stage now gets it right! 📦

Pre-merge checks and finishing touches

❌ Failed checks (1 warning, 1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The pull request description is largely incomplete—all required sections (Description, Types of changes) contain only placeholder content ('-') with no actual details or checked change type boxes.	Complete the description by filling in the actual changes, selecting the appropriate change type (likely 'Build related changes'), and providing context for why this Docker fix is necessary.
Title check	❓ Inconclusive	The title 'feat: fix arka backend docker' is partially related to the changeset—it mentions fixing backend docker, which aligns with the Dockerfile modification, but lacks specificity about the actual change (copying config.json).	Consider revising the title to be more specific, such as 'feat: initialize config.json in backend Docker build' to clarify the actual change being made.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/fix-arka-backend-docker

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[cloudflare-workers-and-pages]

Deploying arka with    Cloudflare Pages

Latest commit:	4438e5c
Status:	✅  Deploy successful!
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Branch Preview URL:	https://feat-fix-arka-backend-docker.arka-3qg.pages.dev

View logs

[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: ASSERTIVE

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between d55fd9b and 4438e5c.

📒 Files selected for processing (1)

• backend/Dockerfile (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)

• GitHub Check: Cloudflare Pages

🔇 Additional comments (1)

backend/Dockerfile (1)

12-12: No issue found. The config.json.default file exists in the repository at backend/config.json.default, so line 12 will execute successfully during the builder stage.

[coderabbitai]

🧹 Nitpick | 🔵 Trivial

Consider adding error handling or a clarifying comment.

The copy operation on line 12 has no fallback if config.json.default is missing, and the intent (that bun run build requires config.json to exist) is not documented. This would aid maintainability and debugging.

Apply this diff to add a clarifying comment and defensive fallback:

-RUN cp config.json.default config.json
+# Ensure config.json exists for the build process
+RUN cp config.json.default config.json || (echo "{}" > config.json && echo "Warning: using empty config" >&2)

Alternatively, if the fallback is unnecessary (because config.json.default is always present), simply add a comment:

-RUN cp config.json.default config.json
+# Create config.json from default for the build step
+RUN cp config.json.default config.json

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	RUN cp config.json.default config.json
	RUN bun run build
	# Ensure config.json exists for the build process
	RUN cp config.json.default config.json || (echo "{}" > config.json && echo "Warning: using empty config" >&2)
	RUN bun run build

🧰 Tools

🪛 Hadolint (2.14.0)

[info] 13-13: Multiple consecutive RUN instructions. Consider consolidation.

(DL3059)

🤖 Prompt for AI Agents

In backend/Dockerfile around lines 12 to 13, the RUN cp config.json.default
config.json step has no fallback or explanation and causes the build to fail if
config.json.default is missing; add a brief clarifying comment stating that bun
run build depends on config.json and either make the COPY step defensive (create
a default config.json when config.json.default is absent or copy from a known
path) or explicitly check for existence before copying so the build fails with a
clear message; if the default is guaranteed to exist, simply add a comment
documenting that invariant so future maintainers understand why the copy is
safe.