Build playground image workflow

.github/workflows/build-playground.yaml

@@ -0,0 +1,17 @@
+name: build playground image
+
+on:
+  pull_request:
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/[email protected]
+      - name: Build and push
+        uses: docker/[email protected]
+        with:
+          context: "playground"
+          push: true
+          tags: playground:image
+          file: "playground/Containerfile"