Add github action to check push and pr

.github/workflows/gradle-build.yml

@@ -0,0 +1,19 @@
+name: Run Gradle on push and pull request
+on: 
+  - push
+  - pull_request
+jobs:
+  gradle:
+    strategy:
+      matrix:
+        java-version: [ 8, 11 ]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: ${{ matrix.java-version}}
+      - uses: eskatos/gradle-command-action@v1
+        with:
+          arguments: check
+