Is Node.js Really Single-Threaded?

 https://betterprogramming.pub/is-node-js-really-single-threaded-7ea59bcc8d64

PM2 setup on production

 https://www.tecmint.com/install-pm2-to-run-nodejs-apps-on-linux-server/

https://www.digitalocean.com/community/tutorials/how-to-use-pm2-to-setup-a-node-js-production-environment-on-an-ubuntu-vps

Integer to comma separated string

ShopCategoryIds.stream().map(String::valueOf)

        .collect(Collectors.joining(","));