add test yaml

.forgejo/workflows/test.yaml

@@ -0,0 +1,17 @@
+on:
+  push:
+
+jobs:
+  test:
+    runs-on: docker
+    container:
+      image: registry.fedoraproject.org/fedora:40
+    steps:
+      - name: install skopeo
+        run: dnf install skopeo
+      - uses: UnifiedDesktop/skopeo-login-action
+        with:
+          registry: ${{ vars.DOCKER_REGISTRY }}
+          password: ${{ secrets.DOCKER_PUSH_KEY }}
+      - name: copy alpine image to registry
+        run: skopeo copy docker://alpine:latest docker://${{ vars.DOCKER_REGISTRY }}/alpine:latest