feat: add k8s deploy pipeline for prod branch

Author: pratik50

.github/workflows/k8s-deploy.yml

@@ -0,0 +1,61 @@
+name: K8s Deploy Pipeline
+
+on:
+  push:
+    branches:
+      - prod
+    paths-ignore:
+      - '**/README.md'
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout code
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      # Docker Buildx setup
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      # Docker Hub login
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      # Build & Push image (SHA + latest)
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            pratik50/receiptsnap-backend:${{ github.sha }}
+            pratik50/receiptsnap-backend:latest
+
+      # Setup kubectl
+      - name: Set up kubectl
+        uses: azure/setup-kubectl@v3
+
+      # Configure kubeconfig
+      - name: Configure kubeconfig
+        run: |
+          mkdir -p $HOME/.kube
+          echo "${{ secrets.KUBE_CONFIG }}" | base64 -d > $HOME/.kube/config
+          chmod 600 $HOME/.kube/config
+
+      # Deploy to Kubernetes cluster (Rolling Update)
+      - name: Deploy to K8s
+        run: |
+          kubectl set image deployment/receiptsnap-backend \
+            backend=pratik50/receiptsnap-backend:${{ github.sha }} \
+            -n backend-team
+          kubectl rollout status deployment/receiptsnap-backend \
+            -n backend-team
+