hotfix: Render staging 배포 실패 복구 — Dockerfile 복원

[unam98]

작업 배경

Render staging 배포가 실패했다 (error: failed to read dockerfile: open Dockerfile: no such file or directory, deploy log).

원인: main엔 원래 Dockerfile이 없었다 — 트렁크 기반 전환 때 dev/main 콘텐츠 정합화를 하면서 Dockerfile을 "로컬 검증 전용"으로 오판해 main에 옮기지 않았다. 그런데 Render 대시보드의 Docker Command 오버라이드는 빌드된 이미지의 실행 커맨드만 바꾸는 것이고, 이미지 자체는 이 Dockerfile로 빌드해왔다. dev 브랜치 삭제 + Render 배포 브랜치를 main으로 전환하면서 Dockerfile을 못 찾아 빌드가 즉시 실패했다.

변경 사항

영역	내용
Dockerfile (신규)	dev의 마지막 버전(OTel agent 제거 이후) 그대로 복원

영향 범위

• Render staging 빌드만 영향. AWS CodeDeploy 기반 상용 배포(prod-cd.yml)는 이 Dockerfile을 쓰지 않아 무관.
• 병합 즉시 Render에서 재배포 트리거해서 실제로 뜨는지 확인 필요.

Test Plan

• git cat-file로 dev 마지막 커밋의 Dockerfile 내용 그대로 복원했음을 확인 (diff 없음)
• 병합 후 Render 재배포 성공 확인 (수동 확인 필요)

🤖 Generated with Claude Code

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