Building docker images during CI/CD and publish on tag (#29)

* build docker image

* Fixing right dockerfile version

* Publishing only on tags

.github/workflows/k8s.yml

@@ -0,0 +1,32 @@
+name: Kubernetes
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./k8s/Dockerfile
+          tags: username/repository:tag
+          # Push only on tags
+          push: ${{ startsWith(github.ref, 'refs/tags/') }}