CI: add image build

.github/workflows/image-build-push.yaml

@@ -0,0 +1,68 @@
+name: Build container image
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "*"
+  pull_request:
+
+permissions:
+  contents: read
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+      attestations: write
+    outputs:
+      digest: ${{ steps.build-and-push.outputs.digest }}
+    steps:
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=${{ github.sha }}
+            type=ref,event=tag
+            type=edge
+        env:
+          # ghcr.io prefers index level annotations
+          DOCKER_METADATA_ANNOTATIONS_LEVELS: index
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
+        with:
+          file: Dockerfile
+          push: ${{ github.ref == 'refs/heads/main' || startswith(github.event.ref, 'refs/tags/') }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          annotations: ${{ steps.meta.outputs.annotations }}
+          build-args: |
+            git_sha=${{ github.sha }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          provenance: mode=max
+          sbom: true