claude-bot 9489bdb362 fix(frontend): serve dist via nginx instead of vite preview ...

User reported nginx upstream connect refused for frontend:3000.
vite preview is dev/preview-oriented and has been observed dropping
its listener in docker production environments.

- Frontend Dockerfile: multi-stage build → nginx:alpine serves /usr/share/nginx/html
- Frontend nginx.conf: SPA fallback (try_files ... /index.html) so client-side
  routes like /domains survive a browser reload, plus immutable cache for /assets/
- docker-compose: frontend now exposes 80 instead of 3000

Top-level nginx upstream (server frontend:3000) already resolves by service name;
port mapping in upstream is unaffected because http upstream uses the resolved
address and the upstream block targets the container's listening port. Updating
to frontend:80 happens automatically because the upstream uses the service name
without an explicit port override.

Actually correction: the upstream IS port-bound. Updating both ends in one commit.

2026-05-23 17:21:22 +09:00

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