ci: Added GitHub Action for building kine

.github/workflows/release.yaml

@@ -0,0 +1,44 @@
+name: Kine build
+
+on:
+  workflow_dispatch:
+
+jobs:
+  buildx:
+    name: Build kine image
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      packages: write
+      contents: read
+      attestations: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to ghcr.io
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push
+        id: push
+        uses: docker/build-push-action@v6
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: true
+          sbom: true
+          provenance: true
+          tags: ghcr.io/loft-sh/kine:v${{ github.event.inputs.kine_version }}
+      - name: Attest
+        uses: actions/attest-build-provenance@v1
+        id: attest
+        with:
+          subject-name: ghcr.io/loft-sh/kine
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true