build: fix pnpm ignoring sharp build scripts

Author: abhyudit

.github/workflows/deploy.yml

@@ -16,6 +16,23 @@ jobs:
     steps:
       - name: Checkout your repository using git
         uses: actions/checkout@v4
+      
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 10.14.0
+      
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'pnpm'
+      
+      - name: Install dependencies
+        run: pnpm install --no-frozen-lockfile
+        env:
+          SHARP_IGNORE_GLOBAL_LIBVIPS: 1
+      
       - name: Install, build, and upload your site
         uses: withastro/action@v3
         # with: