build arm container images on arm host

Author: jurica

.github/workflows/build.yml

@@ -7,11 +7,45 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  build:
-    runs-on: ubuntu-latest
+  build-x86:
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
-        tag: [alpine-amd64, alpine-arm64, alpine-i386, linux-amd64, linux-arm64, linux-i386]
+        tag: [alpine-amd64, alpine-i386, linux-amd64, linux-i386]
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ matrix.tag }}
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v6
+        with:
+          context: "{{defaultContext}}:${{ matrix.tag }}"
+          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ matrix.tag }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+  build-arm:
+    runs-on: ubuntu-24.04-arm
+    strategy:
+      matrix:
+        tag: [alpine-arm64, linux-arm64]
     permissions:
       contents: read
       packages: write