added delete untagged image action

.github/workflows/delete-untagged-image.yml

@@ -0,0 +1,23 @@
+name: Cleanup Untagged Images
+
+on:
+  # every sunday at 00:00
+  schedule:
+    - cron: "0 0 * * SUN"
+  # or manually
+  workflow_dispatch:
+
+jobs:
+  delete-untagged-images:
+    name: Delete Untagged Images
+    runs-on: ubuntu-latest
+    steps:
+      - uses: bots-house/[email protected]
+        with:
+          # NOTE: at now only orgs is supported
+          owner: bots-house
+          name: some-web-service
+          # NOTE: using Personal Access Token
+          token: ${{ secrets.PAT }}
+          # Keep latest N untagged images
+          untagged-keep-latest: 3