chore: add java

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
@@ -32,6 +32,12 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Set up Java
+        uses: actions/setup-java@v2
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
       - name: prepare build environment
         run: echo "CONFIG="$(cat config.json)"" >> ${GITHUB_ENV}