add tag expire workflow

Signed-off-by: Frank Kloeker <[email protected]>

.github/workflows/tag-expire.yaml

@@ -0,0 +1,19 @@
+# https://github.com/marketplace/actions/expire-action
+on:
+  schedule:
+    - cron: "10 6 * * *"
+
+name: Expire container tags
+
+jobs:
+  expire-tags:
+    runs-on: ubuntu-latest
+    name: "expire-tags"
+    steps:
+      - uses: eumel8/[email protected]
+        with:
+          token: ${{secrets.TAGEXPIRE}}
+          repo_type: org
+          orgname: caas-team
+          image_name: py-kube-downscaler
+          days_treshold: 60