CI github action 생성 (#175)

.github/workflows/build_test.yml

@@ -0,0 +1,37 @@
+name: build test(Java - Gradle / Next - npm)
+
+on:
+  pull_request:
+    branches:
+      - "main"
+
+jobs:
+  spring-build-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: "temurin"
+      - name: Build with Gradle
+        run: |
+          cd server
+          export $(cat .env.example | xargs)
+          chmod +x gradlew
+          ./gradlew build
+
+  next-build-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Node 16
+        uses: actions/setup-node@v2
+        with:
+          node-version: "16"
+      - name: Install dependencies and build
+        run: |
+          cd client
+          npm install
+          npm run build