preparing to clean registry

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

.gitea/workflows/docker.yaml

@@ -5,6 +5,7 @@ on:
     branches:
       - main
       - dev
+      - workflow
 
 jobs:
   Docker-Build:
@@ -14,8 +15,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build docker image
-        run: |
-          docker build -t umbrella .          
+        run: docker build -t umbrella .
 
       - name: Store tag date
         run: |
@@ -41,3 +41,9 @@ jobs:
           TAG=$(cat /tmp/tag)
           docker push ${{ secrets.REGISTRY_PATH }}/umbrella:${{ gitea.ref_name }}
           docker push ${{ secrets.REGISTRY_PATH }}/umbrella:$TAG
+
+  Clean-Registry:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get tag list
+        run: curl -u "${{ secrets.REGISTRY_USER }}:${{ secrets.REGISTRY_PASS }}" https://${{ secrets.REGISTRY_PATH }}/v2/umbrella/tags/list | jq -r ".tags[]"