Every container now carries title, description, version, source, and
vendor labels per the OCI image spec. Version is derived from the
existing CONTAINER_APP_VERSION ARG at build time.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
## Summary
- Add two-stage Dockerfile for Loki (Go build → Alpine runtime) in `containers/loki/`
- Rewrite kustomize image to `registry.ops.eblu.me/blumeops/loki`
- Tag is `v3.6.5-placeholder` until first CI build; will be updated post-build
## Details
- UID 10001 matches existing StatefulSet `securityContext` (runAsUser/fsGroup)
- CGO_ENABLED=0, ldflags embed version via `github.com/grafana/loki/v3/pkg/util/build`
- Clones from `forge.ops.eblu.me/mirrors/loki` (mirror created this session)
- Pattern follows miniflux (two-stage Go) + prometheus (ldflags)
## Deployment and Testing
- [ ] Trigger container build: `mise run container-build-and-release loki`
- [ ] Update kustomize tag to actual build tag
- [ ] Deploy from branch: `argocd app set loki --revision feature/loki-container && argocd app sync loki`
- [ ] Verify `/ready` endpoint and log ingestion
- [ ] After merge: update to `[main]` tag (C0 follow-up)
Reviewed-on: #280
