chore(workflows): refine Docker publish workflow for native multi-platform builds

- Updated the workflow to use native architecture runners for `amd64` and `arm64`, improving build efficiency.
- Removed unnecessary QEMU setup as emulation is no longer required.
- Changed the merge job runner to `ubuntu-22.04` for consistency.
- Streamlined the signing process for published Docker images, ensuring clarity in the workflow.

Author: michaelgpt

.github/workflows/docker-publish.yml

@@ -1,41 +1,37 @@
 name: Docker
-
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-
 on:
   push:
-    branches: 
+    branches:
       - main
       - development
       - 'feature/**'
       - 'AN-*'
-    # Publish semver tags as releases.
     tags: [ 'v*.*.*' ]
   pull_request:
     branches: [ "main", "development", "feature/v2-network" ]
 
 env:
-  # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io
-  # github.repository as <account>/<repo>
   IMAGE_NAME: ${{ github.repository }}
 
-
 jobs:
   build:
-    runs-on: ubuntu-latest
+    # Select native arch runners per matrix entry
     strategy:
       fail-fast: false
       matrix:
-        platform: [linux/amd64, linux/arm64]
+        include:
+          - arch: amd64
+            runs_on: ubuntu-22.04
+            platform: linux/amd64
+          - arch: arm64
+            runs_on: ubuntu-22.04-arm
+            platform: linux/arm64
+    runs-on: ${{ matrix.runs_on }}
+
     permissions:
       contents: read
       packages: write
-      # This is used to complete the identity challenge
-      # with sigstore/fulcio when running outside of PRs.
       id-token: write
 
     steps:
@@ -45,17 +41,10 @@ jobs:
       - name: Normalize image name to lowercase
         run: echo "IMAGE_NAME_LOWER=${IMAGE_NAME,,}" >> $GITHUB_ENV
 
-      # Set up BuildKit Docker container builder to be able to build
-      # multi-platform images and export cache
-      # https://github.com/docker/setup-buildx-action
+      # Buildx is still used, but no emulation needed since runners are native
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      # Login against a Docker registry except on PR
-      # https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
         uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
@@ -64,16 +53,12 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      # Extract metadata (tags, labels) for Docker
-      # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME_LOWER }}
 
-      # Build and push per-arch image by digest (don't push on PR)
-      # https://github.com/docker/build-push-action
       - name: Build and push by digest (${{ matrix.platform }})
         id: build
         uses: docker/build-push-action@v6
@@ -105,7 +90,7 @@ jobs:
   merge:
     if: ${{ github.event_name != 'pull_request' }}
     needs: build
-    runs-on: anduro-runner
+    runs-on: ubuntu-22.04
     permissions:
       contents: read
       packages: write
@@ -128,7 +113,6 @@ jobs:
           path: /tmp/digests
           merge-multiple: true
 
-      # Extract metadata (tags, labels) for Docker
       - name: Extract Docker metadata
         id: meta
         uses: docker/metadata-action@v5
@@ -146,11 +130,10 @@ jobs:
             docker buildx imagetools create -t "$tag" $args
           done
 
-      # Install the cosign tool
       - name: Install cosign
         uses: sigstore/cosign-installer@v3.5.0
 
       - name: Sign the published Docker images
         env:
           TAGS: ${{ steps.meta.outputs.tags }}
-        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}