Use native runner

Author: LouisMT

.github/workflows/ci.yaml

@@ -6,9 +6,18 @@ on:
       - main
 
 jobs:
-  publish-docker-image:
-    name: Publish Docker image
-    runs-on: ubuntu-latest
+  build-docker-image:
+    name: Build Docker image
+
+    strategy:
+      matrix:
+        arch:
+          - os: ubuntu-24.04
+            platform: amd64
+          - os: ubuntu-24.04-arm
+            platform: arm64
+
+    runs-on: ${{ matrix.arch.os }}
 
     permissions:
       contents: read
@@ -25,15 +34,27 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
       - name: Build and push
+        id: build
         uses: docker/build-push-action@v6
         with:
-          platforms: linux/amd64,linux/arm64
-          push: true
-          tags: ghcr.io/louismt/ddns-proxy:latest
+          platforms: linux/${{ matrix.arch.platform }}
+          tags: ghcr.io/louismt/ddns-proxy
+          outputs: type=image,push-by-digest=true,name-canonical=true,push=true
+
+      - name: Export digest
+        run: |
+          mkdir -p ${{ runner.temp }}/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "${{ runner.temp }}/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.arch.platform }}
+          path: ${{ runner.temp }}/digests/*
+          if-no-files-found: error
+          retention-days: 1