New action builds Docker image on push with cache

.github/workflows/build-image-on-push.yml

@@ -0,0 +1,26 @@
+name: Build Docker image as test
+
+on:
+  push:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: false
+          # cache-from: type=gha
+          # cache-to: type=gha,mode=max