finally like this?

.gitea/workflows/build.yaml

@@ -8,16 +8,10 @@ name: Build and docker image
 jobs:
   build:
     name: Build
-    runs-on: k8s
+    runs-on: ubuntu:latest
-    container: ubuntu:latest
     steps:
 
-    # - name: Install prerequisites
+    - uses: https://gitea.com/actions/checkout@v4
-    #   run: |
-    #     apt update
-    #     apt install -y docker
-
-    # - uses: https://gitea.com/actions/checkout@v4
 
     - name: Docker login
       uses: docker/login-action@v3