Add forgejo Actions workflow for Maven build and packaging

.forgejo/workflows/maven.yml

@@ -10,15 +10,13 @@ on:
 
 jobs:
   compile:
-    runs-on: ubuntu-latest
+    runs-on: docker
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Set up JDK 17
+      - name: Install JDK 17 and Maven
-        uses: actions/setup-java@v4
+        run: |
-        with:
+          apt-get update
-          distribution: corretto
+          apt-get install -y openjdk-17-jdk maven
-          java-version: "17"
-          cache: maven
       - name: Compile (skip tests)
         run: mvn -B compile -DskipTests