ci: add kind testing

.github/workflows/kind.yaml

@@ -0,0 +1,47 @@
+name: Create Cluster with Registry
+
+on: [push, pull_request]
+
+jobs:
+  kind-testing:
+    runs-on: ubuntu-latest
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Kubernetes KinD Cluster
+        id: kind
+        uses: helm/kind-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@6524bf65af31da8d45b59e8c27de4bd072b392f5 # v3.8.0
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@369eb591f429131d6889c46b94e711f089e6ca96 # v5.6.1
+        with:
+          images: localhost:5000/ctferio/chall-manager-janitor
+
+      - name: Git commit date
+        id: infos
+        run: |
+          # output date per RFC 3339
+          date="$(git log -1 --format=%cd --date=format:%Y-%m-%dT%H:%M:%SZ)"
+          echo "date=$date" >> "$GITHUB_OUTPUT"
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@b32b51a8eda65d6793cd0494a773d4f6bcef32dc # v6.11.0
+        id: build
+        with:
+          push: true
+          tags: localhost:5000/ctferio/chall-manager-janitor
+          labels: ${{ steps.meta.outputs.labels }}
+          file: Dockerfile.chall-manager-janitor
+          build-args: |
+            VERSION=${{ github.sha }}
+            COMMIT=${{ github.sha }}
+            DATE=${{ steps.infos.outputs.date }}