Want to run your FlintCMS server on a server? DigitalOcean is a commonly used server-as-a-service, and works well with Node.js applications. They have a great tutorial on setting up a Node.js application for production that you can check out. FlintCMS has been tested on a DigitalOcean droplet, so it should all work as expected. If you have any problems, please open up an issue here!
DigitalOcean isn’t the only server service out there. You can use AWS too!