change to origin but use setup-java mirror

.gitea/workflows/ci.yaml

@@ -12,12 +12,16 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
-    container:
-      image: dockerp.com/openjdk:17
-
     steps:
       - name: Checkout code
-        uses: http://fly6516.synology.me:4000/Gitea_Action/checkout@v2
+        uses:  http://fly6516.synology.me:4000/Gitea_Action/checkout@v2
+
+      - name: Set up JDK 17
+        uses: http://fly6516.synology.me:4000/Gitea_Action/setup-java@v2
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          server-url: 'https://mirrors.tuna.tsinghua.edu.cn/AdoptOpenJDK/'
 
       - name: Compile Java program
         run: javac HelloWorld.java -d ./build/classes