Build a Docker image.

.github/workflows/cd.yml

@@ -0,0 +1,49 @@
+name: CD
+
+on:
+  push:
+    branches: main
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+permissions:
+  packages: write
+
+jobs:
+  build:
+    name: Build Docker image
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install cosign
+        uses: sigstore/cosign-installer@v3.1.1
+        with:
+          cosign-release: v2.1.1
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v2.9.1
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v2.2.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4.6.0
+        with:
+          images: "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
+          tags: type=raw,value=latest
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4.1.1
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: 'true'
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max=