Since Digital Ocean doesn't offer ClearOS, here are instructions to convert a CentOS 7.x into a ClearOS 7.x.
- Install CentOS 7 as usual via the Digital Ocean interface.
- How to upgrade a fresh install of CentOS to ClearOS
- Give it a few minutes to complete the process. After this, you will be able to access port 81 to finish the configuration (ex.: https://example.org:81 ): Post-installation ClearOS wizard.
Given that the conversion of CentOS to ClearOS doesn't always work (if versions are mismatched), another option: https://www.digitalocean.com/docs/images/custom-images/overview/.