Add connectivity test before logging into the Docker registry

.gitea/workflows/create-image.yaml

@@ -51,7 +51,12 @@ jobs:
 
       - uses: actions/checkout@v4
 
-      - name: Login to Gitea Docker Registry
+      - name: Test connectivity
+        run: |
+          echo "Testing connection to registry..."
+          time curl -v https://${{ env.DOCKER_REGISTRY_DOMAIN }}/v2/ || true
+          
+      - name: Login to the Container registry
         uses: docker/login-action@v3
         with:
           registry: ${{ env.DOCKER_REGISTRY_DOMAIN }}