Add workflow for publishing docker images on main and releases

.github/workflows/publish-docker.yml

@@ -0,0 +1,61 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    branches: ['main']
+    tags: ['*']
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: cpu-burner
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+
+    steps:
+
+        - name: Set up QEMU
+          uses: docker/setup-qemu-action@v3
+        - name: Set up Docker Buildx
+          uses: docker/setup-buildx-action@v3
+
+        - name: Checkout repository
+          uses: actions/checkout@v4
+
+        - name: Log in to the Container registry
+          uses: docker/login-action@v3
+          with:
+            registry: ${{ env.REGISTRY }}
+            username: ${{ github.actor }}
+            password: ${{ secrets.GITHUB_TOKEN }}
+
+        - name: Extract metadata (tags, labels) for Docker
+          id: meta
+          uses: docker/metadata-action@v5
+          with:
+            images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+        - name: Build and push Docker image
+          id: push
+          uses: docker/build-push-action@v6
+          with:
+            context: .
+            platforms: linux/amd64,linux/arm64
+            push: true
+            tags: ${{ steps.meta.outputs.tags }}
+            labels: ${{ steps.meta.outputs.labels }}
+
+        - name: Generate artifact attestation
+          uses: actions/attest-build-provenance@v1
+          with:
+            subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+            subject-digest: ${{ steps.push.outputs.digest }}
+            push-to-registry: true
+