After the Ghost One-Click Droplet is created and the domain and DNS records are set up, you’ll need to log into the Ghost Droplet to complete its setup. From a terminal on your local computer, connect to the Droplet as root. Make sure to substitute the IP address of the Droplet.
As soon as you log in, the Droplet will automatically make sure it’s running the most recent version of Ghost, and will prompt you to press ENTER to finalize the setup.
Ensuring Ghost-CLI is up-to-date…
Ghost will prompt you for two details:
Add an A Record -> your_droplet_ip & ensure DNS has fully propagated
Or alternatively enter http://your_droplet_ip
Your email address (only used for SSL)
Press enter when you’re ready to get started!
Follow the installation prompts to configure Ghost.
As soon as you’re done, make sure to configure the admin user using the administrative interface at
http://use_your_droplet_ip/ghost (making sure to substitute the Droplet’s IP address in the URL). Until you configure the admin user, anyone who discovers the site can configure the administrative user, take control of the Ghost site, and potentially take control of the Droplet.
Once the installation and setup is fully complete, you can access the new Ghost site by visiting the Droplet IP address in your browser.
To upgrade or maintain the Ghost install in future, you’ll always have to become the ghost-mgr user in order to have the correct permissions:
sudo -i -u ghost-mgr
After that, all tasks can be completed with the Ghost-CLI tool. Run ghost help for an overview of available commands, or check out the Ghost-CLI docs for full details.
You can read more about it here - https://marketplace.digitalocean.com/apps/ghost