Switch build-docker-image workflow from services to container configuration

.gitea/workflows/build-docker-image.yml

@@ -8,10 +8,10 @@ on:
 jobs:
   build-server:
     runs-on: ubuntu-24.04
-    services:
+    container:
-      docker:
       image: docker:dind
-        options: --privileged --security-opt seccomp=unconfined
+      privileged: true
+      
     steps:
       # 1. Check out the repo
       - uses: actions/checkout@v4