Update workflow

.gitea/workflows/build.yml

@@ -22,6 +22,18 @@ jobs:
           java-version: 8
           distribution: 'temurin'
 
+      - name: Install Maven
+        run: sudo apt-get update && sudo apt-get install -y maven
+
+      - name: Cache Maven dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+
       - name: Build all
         run: mvn clean package