Update github pages workflow

.github/workflows/webapp.yml

@@ -15,21 +15,6 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v3
-      with:
-        node-version: 18.x
-
-    - name: Build
-      run: |
-        npm install
-        npm run prepublish
   deploy:
     needs: build
     environment:
@@ -41,6 +26,10 @@ jobs:
         uses: actions/checkout@v3
       - name: Setup Pages
         uses: actions/configure-pages@v3
+      - name: Build
+        run: |
+          npm install
+          npm run prepublish
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v2
         with: