wip CI

Author: ClemensElflein

.github/workflows/ci.yaml

@@ -25,6 +25,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Build