�deploy: 배포 워크플로우 추가

.github/workflows/ci.cd.yml

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+name: ci/cd
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build-backend:
+    runs-on: ubuntu-22.04
+    defaults:
+      run:
+        working-directory: backend
+
+    steps:
+      - name: Set up Repository
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: "17"
+          distribution: "corretto"
+
+      - name: Give permission for Gradle
+        run: chmod +x gradlew
+
+      - name: Cache Gradle
+        id: cache-gradle
+        uses: actions/cache@v4
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+      - name: Build with Gradle
+        run: ./gradlew bootJar
+
+      - name: Upload jar file artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: BackendApplicationJar
+          path: backend/build/libs/*.jar
+
+  build-frontend:
+    runs-on: ubuntu-22.04
+    defaults:
+      run:
+        working-directory: frontend
+
+    steps:
+      - name: Set up Repository
+        uses: actions/checkout@v4
+
+      - name: Setup node with cache
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: "npm"
+          cache-dependency-path: "**/package-lock.json"
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build App
+        run: npm run build
+
+      - name: Upload frontend build file to artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: FrontendApplication
+          path: frontend/out
+
+  deploy:
+    needs: [build-backend, build-frontend]
+    runs-on: self-hosted
+
+    steps:
+      - name: Remove previous version FRONT app
+        working-directory: frontend/prod/
+        run: rm -rf dist
+
+      - name: Download FRONT build file from artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: FrontendApplication
+          path: frontend/prod/
+
+      - name: Remove previous version BACK jar
+        working-directory: backend/prod/
+        run: rm -f *.jar
+
+      - name: Download BACK jar file from artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: BackendApplicationJar
+          path: backend/prod/
+
+      - name: Deploy BACK to production server
+        working-directory: backend/prod/
+        run: ./start.sh