Extend go_build() with buildmode and extra_env params, migrate miniflux
and forgejo-runner to use it, and bump all Alpine bases from 3.22 to 3.23.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
## Summary
- Add native Dagger `container.py` for forgejo-runner (Go + Alpine runtime, static binary with CGO for SQLite)
- Update kustomization to point to local registry image (tag is placeholder until CI builds)
- Uses existing `clone_from_forge("forgejo-runner", ...)` mirror
## Test plan
- [x] `dagger call build --src=. --container-name=forgejo-runner` passes locally
- [ ] CI container build from branch succeeds
- [ ] Update kustomization tag to built image, deploy from branch via ArgoCD `--revision`
- [ ] Verify runner registers and picks up jobs
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: #334
