- Move build.sh to scripts/build.sh (convention from project-template)
- Add .gitea/workflows/build.yml: triggers on push to main when
Dockerfile or config files change, builds :dev tag via Kaniko
- Every push → CI builds harbor.manabo.org/library/smtp-relay:dev
→ ArgoCD Image Updater detects new digest → deploys to hermes
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>