Remove submodule checkout and set Docker build context to current directory.

.github/workflows/docker.yml

@@ -10,8 +10,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-        with:
-          submodules: recursive
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
@@ -39,6 +37,7 @@ jobs:
       - name: Build and release Docker images
         uses: docker/build-push-action@v5
         with:
+          context: .
           platforms: linux/386,linux/amd64,linux/arm64
           tags: |
             ${{ steps.tag.outputs.latest }}