Hi @ItsRicmor,

Yes, it’s entirely possible to add as many applications on a droplet as you wish. To setup both applications, you’ll first need to install NodeJS on your droplet. Luckily, DigitalOcean has a pretty good article on how to do so - https://www.digitalocean.com/community/tutorials/how-to-install-node-js-on-ubuntu-18-04

As soon as you have finished the article, you can turn your attention to the React Tutorials sections again on DigitalOcean - https://www.digitalocean.com/community/tags/react . It has tons of article on setting and configuring such applications to doing a lot more complex stuff.

Setting up the Spring Book Kotlin Api would most probably require some sort of a WebService like Nginx, for that, you’ll need to follow this tutorial - https://www.digitalocean.com/community/tutorials/how-to-install-linux-nginx-mysql-php-lemp-stack-ubuntu-18-04

Regards,
KDSys