build: look for repository first

.gitea/workflows/docker-publish.yml

@@ -32,6 +32,14 @@ jobs:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
 
+      - name: Ensure repository exists
+        run: |
+          curl -f -X POST \
+            -H "Authorization: token ${{ secrets.REGISTRY_PASSWORD }}" \
+            -H "Content-Type: application/json" \
+            -d '{"name":"zebra-power","private":false,"description":"Zebra Power Docker Images"}' \
+            ${{ env.REGISTRY }}/api/v1/user/repos || echo "Repository may already exist"
+
       - name: Extract metadata
         id: meta
         uses: docker/metadata-action@v5