Fix LFS (#3)

Reviewed-on: #3
Co-authored-by: Julien Fastré <julien.fastre@champs-libres.coop>
Co-committed-by: Julien Fastré <julien.fastre@champs-libres.coop>

.gitea/workflows/build-image.yml

@@ -16,10 +16,14 @@ jobs:
   build:
     runs-on: cth-ubuntu-latest
     steps:
-      - name: Check out repository
-        uses: https://github.com/actions/checkout@v4
-        with:
-          lfs: true
+      - name: Git checkout with LFS
+        # see https://gitea.com/gitea/act_runner/issues/164#issuecomment-921571
+        run: |
+          git init
+          git remote add origin https://gitea.champs-libres.be/champs-libres/prez-concepts-chill.git
+          git fetch --depth 1 origin ${{ gitea.ref }}
+          git checkout FETCH_HEAD
+          git lfs pull
 
       - name: update packages
         run: apt-get update