Testing github actions with gradle

- Added github actions workflow

.github/workflows/build.yml

@@ -0,0 +1,17 @@
+name: Test Github Actions
+
+on:
+  push:
+
+jobs:
+  build-gradle-project:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout project sources
+        uses: actions/checkout@v3
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
+      - name: Run build with Gradle Wrapper
+        run: ./gradlew checksum
+      - name: List files
+        run: ls -lrta