Docker Desktop's VM can't resolve tailnet hostnames. Work around this by:
1. Starting a Tailscale container that joins the tailnet
2. Building the image with docker build
3. Saving to tarball with docker save
4. Pushing via skopeo inside the Tailscale container
Uses TS_CI_GATEWAY_AUTHKEY repository secret for authentication.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
## Summary
- Add `containers/nettest/` with Alpine-based Dockerfile and connectivity test script
- Add `.forgejo/workflows/build-nettest.yaml` workflow triggered by `nettest-v*` tags
- Test script checks DNS resolution and HTTPS connectivity to forge and registry
## Deployment and Testing
- [ ] Merge PR to main
- [ ] Run `mise run container-release nettest v0.1.0` to trigger first build
- [ ] Verify workflow runs successfully and container can reach tailnet services
- [ ] Manually test from minikube: `kubectl run nettest --rm -it --image=registry.tail8d86e.ts.net/blumeops/nettest:v0.1.0`
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: https://forge.tail8d86e.ts.net/eblume/blumeops/pulls/52
## Summary
- Replace Docker with Buildah for container image builds
- No Docker socket required - buildah is daemonless
- Cleaner security model (no privileged containers or socket mounting)
- Remove Docker-related security context from deployment
## Changes
- Update Dockerfile to install buildah/podman instead of docker-cli
- Configure buildah storage with overlay driver and fuse-overlayfs
- Update composite action to use `buildah bud` and `buildah push`
- Add `imagePullPolicy: Always` to ensure fresh image pulls
- Update test workflow to verify buildah/podman
## Testing
- [ ] Runner pod starts successfully
- [ ] Buildah is available in runner
- [ ] Test workflow verifies buildah/podman versions
- [ ] Container build workflow builds and pushes to zot
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: https://forge.tail8d86e.ts.net/eblume/blumeops/pulls/51
## Summary
- Fix workflow to use `github.*` context variables (Forgejo schema validator only recognizes GitHub Actions syntax, not `gitea.*` aliases)
- Pass untrusted inputs through environment variables (security best practice per actionlint)
- Add actionlint to Brewfile and pre-commit config to catch workflow validation errors locally
## Deployment and Testing
- [x] Pre-commit hooks all pass
- [x] actionlint validates `.forgejo/workflows/test.yaml` successfully
- [ ] Verify workflow runs without errors on Forge after merge
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: https://forge.tail8d86e.ts.net/eblume/blumeops/pulls/49
