Build docker image on self-hosted runner

.github/workflows/build-image.yml

@@ -6,15 +6,9 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
 
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          sparse-checkout: |
-            .github/Dockerfile
-          sparse-checkout-cone-mode: false
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3