Fix GitHub Actions workflow for Astro build

Author: UnderscorePan

.github/workflows/deploy.yml

@@ -16,8 +16,18 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 18
+      - name: Install dependencies
+        run: npm ci
       - name: Build
-        uses: withastro/action@v3
+        run: npm run build
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: ./dist
 
   deploy:
     needs: build