ci(actions): run on self-hosted environment (no container)

.gitea/workflows/ci.yml

@@ -12,17 +12,14 @@ concurrency:
 
 jobs:
   build_test_package:
-    runs-on: ubuntu-latest
-    container:
-      image: maven:3.9-eclipse-temurin-17
+    runs-on: self-hosted
     steps:
       - name: Show Java and Maven versions
         run: |
           java -version
           mvn -v
-      # Gitea act_runner clones the repository; explicit checkout is optional.
+      # Gitea act_runner provides the repo workspace by default.
       - name: Build and test
         run: mvn -B -DskipTests=false clean verify
       - name: Package
         run: mvn -B -DskipTests clean package
-