chore: ci.yml 추가

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: Java CI with Gradle
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches: [ "main" ]
+  push:
+    branches: [ "main" , "feature/ci"]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up JDK 17
+
+        uses: actions/setup-java@v3
+        with:
+          java-version: '17'
+          distribution: 'corretto'
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew test