add npm build command

Author: marclave

.github/workflows/sdk-publish.yaml

@@ -21,6 +21,7 @@ jobs:
           node-version: '20.x'
           registry-url: 'https://registry.npmjs.org'
       - run: npm ci
+      - run: npm prepublishOnly
       - run: npm publish --provenance --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}