test update github actions workflow yml

.github/workflows/main.yml

@@ -6,9 +6,9 @@ on: # 이벤트 트리거
       - master # master 일 경우만
 
 jobs: # jobs
-  build: # GitHub-hosted runners env
+  install:
     runs-on: ubuntu-latest # using Ubuntu LTS
-    steps: # steps
+    steps:
       - name: git clone #
         uses: actions/checkout@v2 #
 
@@ -17,10 +17,16 @@ jobs: # jobs
           npm cache clean --force
           npm install --unsafe-perm
           npm install babel-cli cross-env webpack-cli --global
-
+  build: # GitHub-hosted runners env
+    needs: install
+    runs-on: ubuntu-latest # using Ubuntu LTS
+    steps: # steps
       - name: build #
         run: npm run build # code build
-
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
       - name: deploy # 배포
         env:
           AWS_ACCESS_KEY_ID: '${{ secrets.AWS_ACCESS_KEY_ID }}'
@@ -30,7 +36,10 @@ jobs: # jobs
             --recursive \
             --region ap-northeast-2 \
             ./build s3://ktestweb
-
+  invalidation:
+    needs: deploy
+    runs-on: ubuntu-latest
+    steps:
       # CloudFront 무효화
       - name: Invalidate CloudFront
         uses: chetan/invalidate-cloudfront-action@v1