add github action for docker image release

.github/workflows/deploy-image.yml

@@ -0,0 +1,19 @@
+name: Create and publish a package
+on:
+  release:
+    types: [published]
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Build container image
+      uses: docker/build-push-action@v1
+      with:
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+        registry: docker.pkg.github.com
+        repository: ${{ github.repository }}/kustomize-helm-transformer
+        tag_with_sha: true
+        tag_with_ref: true