fix: Switch Docker build stage from Bun to Node.js (PR #355 CI fix)

[github-actions]

CI Auto-Fix

Original PR: #355
Failed CI Run: Non-Main Branch CI/CD #20300261542

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Problem

The Docker build failed with a native module incompatibility error:

TypeError: symbol 'napi_register_module_v1' not found in native module. 
Is this a Node API (napi) module?
    at <anonymous> (next.config.compiled.js:12:63)
error: script "build" exited with code 1

Root Cause: Bun runtime has incomplete N-API support for native Node.js modules. The next-intl/plugin dependency (used in next.config.ts) requires full N-API compatibility that Bun doesn't provide yet.

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Solution

Switch the Docker build stage from oven/bun:slim to node:22-slim:

Change	Before	After
Build base image	oven/bun:slim	node:22-slim
Dependency install	bun install	npm install --production=false
Build command	bun run build	npm run build
Runtime stage	node:22-slim (unchanged)	node:22-slim (unchanged)

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Fixes Applied

File	Change Type	Description
deploy/Dockerfile	Build system	Replace Bun with Node.js for build stage (lines 3, 8, 27)

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Impact Assessment

✅ No runtime behavior changes - Runtime stage already uses Node.js
✅ No dependency changes - Same packages, just different build tool
✅ Build reliability improved - Full N-API compatibility ensured
⚠️ Build time may increase slightly - npm is slower than Bun for installs

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Verification Checklist

• Dockerfile syntax is valid
• Build stage uses Node.js 22-slim
• Runtime stage unchanged (Node.js 22-slim)
• No logic or functionality changes
• Minimal scope (only Dockerfile modified)

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Alternative Approaches Considered

Approach	Why Not Chosen
Update Bun version	N-API support still incomplete in latest Bun
Remove next-intl	Would break internationalization features
Use Bun for runtime too	Would risk production runtime issues

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Auto-generated by Claude AI - Safe mechanical fix only