fix : artifact upload/download to workflow for s3 deploy

.github/workflows/main.yml

@@ -1,10 +1,10 @@
 name: Vite Build and Deploy
 
-on: 
+on:
   push:
     branches:
       - main
-  pull_request:  # PR 생성 시 실행되도록 추가
+  pull_request: # PR 생성 시 실행되도록 추가
     branches:
       - main
 
@@ -33,16 +33,28 @@ jobs:
       - name: Debug Build Directory
         run: ls -l dist || echo "dist/ directory not found"
 
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
   deploy:
     if: github.event_name == 'push' # push 일 때만 배포 실행
     runs-on: ubuntu-latest
     needs: build # build가 성공해야 deploy 실행
     steps:
+      - name: Download build artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist
+
       - name: Deploy to S3
         env:
           AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
         run: |
           aws s3 sync \
             dist/ s3://valia-react/ \
-            --region ap-northeast-2
+            --region ap-northeast-2