Test: main PR 승인 테스트

.github/workflows/backendCI.yml

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+name: PR Build & Test
+
+# PR 이벤트 트리거 (main, dev 브랜치 대상으로)
+on:
+  pull_request:
+    branches:
+      - main
+      - dev
+    types: [opened, synchronize, reopened]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      # 저장소 체크아웃
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      # Java 21 설치
+      - name: Set up Java 21
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'temurin'   # Eclipse Temurin JDK
+          java-version: '21'        # Gradle build.gradle toolchain에 맞춤
+
+      # Build (테스트 제외)
+      - name: Build project
+        run: ./gradlew clean build -x test
+
+      # Test 실행
+      - name: Run tests
+        run: ./gradlew test

src/main/java/com/back/domain/home/HomeController.java

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+package com.back.domain.home;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HomeController {
+    @GetMapping("/")
+    public String hello() {
+        return "Hello World";
+    }
+}