add: Github Actions CI/CD 관련 파일 추가

.github/workflows/deploy.yml

@@ -0,0 +1,26 @@
+name: Deploy Frontend To EC2
+
+on:
+  push:
+    branches:
+      - dev
+
+jobs:
+  Deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: SSH(원격 접속)로 EC2에 접속하기
+        uses: appleboy/[email protected]
+        with:
+          host: ${{ secrets.EC2_HOST }}
+          username: ${{ secrets.EC2_USERNAME }}
+          key: ${{ secrets.EC2_PRIVATE_KEY }}
+          script_stop: true
+          script: |
+            cd /home/ubuntu/la-front-end
+            git pull origin dev
+            rm -rf build
+            npm install
+            npm run build
+            sudo fuser -k -n tcp 3000 || true
+            npx serve -s build -l 3000 > ./front_output.log 2>&1 &