Forgot to checkout repo

.gitea/workflows/build.yaml

@@ -9,6 +9,8 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v5
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build and push