Set container image to use to run the pipeline

.gitea/workflows/build.yaml

@@ -10,12 +10,14 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
       - name: Setup JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v6
         with:
           distribution: temurin
           java-version: '21'