Docker image question mark?

.forgejo/workflows/test.yml

@@ -7,3 +7,15 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/rust-toolchain@stable
       - run: cargo test --all-features
+  docker:
+    name: docker build
+    runs-on: docker
+    steps:
+      - uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME}}
+          password: ${{ secrets.DOCKERHUB_TOKEN}}
+      - uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: karcsesz/fingerlink:latest