CI: Checkout with LFS and recursive submos

Author: nevyn

.github/workflows/docker-image.yml

@@ -11,5 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        lfs: 'true'
+        submodules: 'recursive'
     - name: Build the Docker image
       run: docker build . --file Dockerfile --tag alloverse/alloplace3:$(date +%s)