solution: setup CI

.github/workflows/unit-test.yaml

@@ -0,0 +1,20 @@
+name: Unit Test
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
+      - name: Check
+        uses: eskatos/gradle-command-action@v1
+        with:
+          arguments: check