setup pnpm for build

Author: justinmakaila

.github/workflows/deploy-lambda.yml

@@ -23,6 +23,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v1
         with: