use specific container

.gitea/workflows/build.yaml

@@ -5,6 +5,7 @@ on: [push]
 jobs:
   Explore-Gitea-Actions:
     runs-on: [self-hosted, windows]
+    container: nostalgic_brown
     steps:
       - run: echo "The job was automatically triggered by a ${{ github.event_name }} event."
       - run: echo "This job is now running on a ${{ runner.os }} server hosted by Gitea!"