ci: add kind testing

.github/workflows/kind.yaml

@@ -0,0 +1,100 @@
+name: Create Cluster with Registry
+
+on:
+  push: {}
+
+jobs:
+  setup-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Docker registry
+        run: |
+          docker network create kind || true
+          docker run -d --network kind --name registry -p 5000:5000 registry:2
+
+      - name: Set up Kind cluster
+        uses: helm/kind-action@v1.7.0
+        with:
+          version: v0.20.0
+        env:
+          KIND_EXPERIMENTAL_DOCKER_NETWORK: kind
+
+      - name: Connect Kind to the Docker registry
+        run: |
+          cat <<EOF > kind-config.yaml
+          apiVersion: kind.x-k8s.io/v1alpha4
+          kind: Cluster
+          containerdConfigPatches:
+          - |
+            [plugins."io.containerd.grpc.v1.cri".registry.mirrors."localhost:5000"]
+              endpoint = ["http://registry:5000"]
+          EOF
+          kind create cluster --config kind-config.yaml
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@369eb591f429131d6889c46b94e711f089e6ca96 # v5.6.1
+        with:
+          images: localhost:5000/ctferio/chall-manager
+
+      - 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: ${{ github.sha }}
+          labels: ${{ steps.meta.outputs.labels }}
+          file: Dockerfile.chall-manager
+          build-args: |
+            VERSION=${{ github.sha }}
+            COMMIT=${{ github.sha }}
+            DATE=${{ steps.infos.outputs.date }}
+
+      - name: Deploy application to Kind
+        run: |
+          kubectl apply -f - <<EOF
+          apiVersion: apps/v1
+          kind: Deployment
+          metadata:
+            name: my-app
+          spec:
+            replicas: 1
+            selector:
+              matchLabels:
+                app: my-app
+            template:
+              metadata:
+                labels:
+                  app: my-app
+              spec:
+                containers:
+                - name: my-app
+                  image: localhost:5000/ctferio/chall-manager:${{ github.sha }}
+                  ports:
+                  - containerPort: 8080
+          ---
+          apiVersion: v1
+          kind: Service
+          metadata:
+            name: my-app
+          spec:
+            selector:
+              app: my-app
+            ports:
+            - protocol: TCP
+              port: 80
+              targetPort: 8080
+          EOF
+      - name: Verify deployment
+        run: |
+          kubectl rollout status deployment/my-app