added cleanup

.gitea/workflows/cleanup_registry.yaml

@@ -0,0 +1,24 @@
+name: Cleanup old Docker images
+
+on:
+  schedule:
+    - cron: '0 6 * * *'  # Täglich um 6 Uhr
+  workflow_dispatch:
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Install crane (OCI Registry tool)
+        run: |
+          curl -LO https://github.com/google/go-containerregistry/releases/latest/download/go-containerregistry_Linux_x86_64.tar.gz
+          tar -xzf go-containerregistry_Linux_x86_64.tar.gz
+          chmod +x crane
+          sudo mv crane /usr/local/bin/
+
+      - name: List Docker tags
+        run: |
+          crane ls git.0day.agency/${{ secrets.REGISTRY_USERNAME }}/novelai-discord-bot \
+          --username ${{ secrets.REGISTRY_USERNAME }} \
+          --password ${{ secrets.REGISTRY_TOKEN }}