- Add docker/Dockerfile.nestjs-base with all shared packages pre-built
- Convert 6 backend Dockerfiles (chat, todo, calendar, clock, contacts,
mukke) to inherit from nestjs-base:local
- Fix bugs: duplicate shared-nestjs-setup builds (mukke), unnecessary
shared-error-tracking rebuild in production stage (chat, clock)
- CD pipeline builds base image before services when backends deploy
- Net reduction: 317 lines removed, 112 added (-205 lines)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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