Build PRs using github actions

.github/workflows/main.yml

@@ -0,0 +1,21 @@
+name: pr-check
+
+on:
+  push:
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build and test
+    runs-on: ubuntu-latest
+    container:
+      image: adoptopenjdk/openjdk8:latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build with Gradle
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: build test --scan