List of required changes - basic

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• Fix deprecated steps in CI (tests)
• Fix go build ./... failing from repo root (cmd package name collision)
• Fix remaining README typos and branding inconsistency
• Add SRI hash to the Plotly CDN script tag
• Add coverage report to CI workflow
• Add license and other required files
• Purge large PNG from git history
• Add Dependabot (gomod + github-actions) for automated dependency updates
• Update documenation with dockerized stuff
• Dockerize Spectogram
• Add Docker checks into CI
• Update documenation with docker stuff...
• Create helm chart for k8s (kind) cluster
• Add CI workflow for changelog
• Add CI release automation
• Improve CI workflows status/reports
• Update documentation for k8s and CI setup

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Update: Dependabot's gonum 0.14.0 -> 0.17.0 PR (#11) hit CI failures because gonum 0.17.0 requires Go >=1.24, while the workflow was pinned to 1.21-1.23. Bumped CI to Go 1.24 to match, verified build/vet/gofmt/test locally, and PR #11 is now merged into main.

Also cleaned up repo housekeeping: deleted 6 stale branches that were already merged into main (adding-ci, apply-fix-json-mismatch, fix-basic-checklist-1-2-3, fix-basic-checklist-4-8, minor-fixed-cleanup, update-document-project-status). No open PRs remain.

Remaining on this checklist: purge large PNG from git history (now unblocked), then the Docker/k8s/CI-release-automation items.

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Purged spectogram.png (10MB blob) from all git history using git-filter-repo, then force-pushed the rewritten main. .git shrank from ~10MB to 176K. The file was already gitignored and unreferenced in the working tree, and main was the only branch, so no coordination was needed.

Note: since history was rewritten, anyone with a local clone needs to re-clone or hard-reset to the new main rather than pulling.

Basic checklist (issue #4) is now down to Docker/k8s/CI-release-automation items only.

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Dockerized via PR #14: multi-stage Dockerfile (Go build stage + Python runtime for the static file server), docker-entrypoint.sh dispatching generate/serve container commands, a Docker Build CI job, and README docs for the containerized workflow. All CI checks pass, including the new Docker Build job.

Remaining on this checklist: helm chart for k8s (kind), CI changelog workflow, CI release automation, CI status/report improvements, and k8s/CI documentation.

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PR #15 adds release automation, changelog, and CI status reporting: all 6 checks pass (Build & Vet, Test, Test matrix x2, Docker Build, and the new CI Summary job).

• Release automation: pushing a vX.Y.Z tag builds Linux/macOS binaries and publishes a GitHub Release with auto-generated notes
• Changelog: CHANGELOG.md documents the release process; notes are generated per-release from commit history rather than hand-maintained
• CI status/reports: new CI Summary job writes a consolidated pass/fail table to the step summary

PR is green and ready to merge (#15) — checking off the corresponding items now, pending merge.

Remaining on this checklist: helm chart for k8s (kind) + k8s/CI documentation.

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Helm chart added via PR #16, all 8 CI checks pass — including a Deploy to kind job that builds the image, spins up a real kind cluster, helm install, and runs helm test.

• Chart (charts/spectogram/): Deployment + Service + optional Ingress/HPA, PVC-backed data directory, and an opt-in generate Job that runs the Go CLI against a ConfigMap-provided audio file, writing to the same PVC the serve Deployment mounts
• Portable by design: defaults (ClusterIP, chart-managed PVC on the cluster's default StorageClass, no Ingress) work unmodified on kind; moving to cloud/on-prem is values overrides only (image registry, service type, ingress, storage class) — no template changes
• Manually validated end-to-end on a local kind cluster beyond what CI covers: confirmed the PVC bound, ran the generate Job against a synthesized WAV, confirmed output landed on the shared PVC and was served correctly through the Service
• Documentation: charts/spectogram/README.md (kind quickstart, data generation, cloud/on-prem deployment) linked from the top-level README

PR is green and ready to merge: #16

This closes out all 17 items on this checklist — issue #4 is complete. Remaining project work is tracked on issue #5 (advanced/UI items).