fix: build arm64

[reecepbcups]

closes #123

We need an arm64 build for mizu testing, is a pain to have to build locally vs using an upstream ghcr docker image version

Summary

Confirming it works

[coderabbitai]

📝 Walkthrough

Walkthrough

The Docker publish workflow adds a QEMU setup step and extends the build-and-push platforms configuration to include linux/arm64 in addition to linux/amd64, enabling multi-architecture image publishing.

Changes

Multi-arch Docker build

Layer / File(s)	Summary
QEMU setup and multi-platform build config .github/workflows/docker-publish.yml	Adds a QEMU setup step via docker/setup-qemu-action and extends the build-and-push platforms to linux/amd64,linux/arm64.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Assessment against linked issues

Objective	Addressed	Explanation
Build arm64 image for macos support (#123)	✅

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[coderabbitai]

🧹 Nitpick comments (1)

.github/workflows/docker-publish.yml (1)

89-89: 🚀 Performance & Scalability | 🔵 Trivial | 💤 Low value

Multi-arch build config is correct and consistent with .ko.yaml.

The platform list linux/amd64,linux/arm64 matches the defaultPlatforms declared in .ko.yaml (order differs but is functionally equivalent). The comma-separated format is correct for docker/build-push-action@v5.0.0.

One note: QEMU-emulated arm64 builds are significantly slower than native — the CI run took ~1h 23m. If build time becomes a bottleneck, consider using GitHub's native arm64 runners (ubuntu-24.04-arm) for the arm64 leg via a build matrix, which would eliminate QEMU overhead entirely.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.github/workflows/docker-publish.yml at line 89, The multi-arch
configuration in the docker publish workflow is already correct, so no code
change is needed for the `platforms` setting in the `docker/build-push-action`
step or its alignment with `.ko.yaml`'s `defaultPlatforms`. If build duration
becomes a concern, update the workflow around the existing build job to use a
matrix and route the arm64 leg to native `ubuntu-24.04-arm` runners instead of
QEMU-emulated builds.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In @.github/workflows/docker-publish.yml:
- Line 89: The multi-arch configuration in the docker publish workflow is
already correct, so no code change is needed for the `platforms` setting in the
`docker/build-push-action` step or its alignment with `.ko.yaml`'s
`defaultPlatforms`. If build duration becomes a concern, update the workflow
around the existing build job to use a matrix and route the arm64 leg to native
`ubuntu-24.04-arm` runners instead of QEMU-emulated builds.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: de64bdae-b27b-461c-873c-65a30578c074

📥 Commits

Reviewing files that changed from the base of the PR and between b291045 and 51af573.

📒 Files selected for processing (1)

• .github/workflows/docker-publish.yml

📜 Review details

⚠️ CI failures not shown inline (1)

GitHub Actions: .github/workflows/test.yml / 0_test.txt: fix: build arm64

Conclusion: failure

View job details

##[group]Run go test -coverpkg=all ./... -coverprofile=coverage.txt
 �[36;1mgo test -coverpkg=all ./... -coverprofile=coverage.txt�[0m
 shell: /usr/bin/bash -e {0}
 ##[endgroup]
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 go: downloading cosmossdk.io/api v0.7.6
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 go: downloading github....

🔇 Additional comments (1)

.github/workflows/docker-publish.yml (1)

44-50: LGTM!