Add submodule to workflow checkout

Author: toddbaert

.github/workflows/build-oci.yml

@@ -1,10 +1,9 @@
-
 name: ci
 
 on:
   push:
-   branches:
-   - main
+    branches:
+      - main
 
 env:
   REGISTRY: ghcr.io
@@ -16,20 +15,22 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-        
+        with:
+          submodules: recursive
+
       - name: Log in to the Container registry
         uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-          
+
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}   
-          
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
       - name: Set up QEMU
         uses: docker/setup-qemu-action@master
         with: