Sometimes you need a GUI on your VPS, or an instance of Ubuntu Desktop to execute platform-specific applications. DigitalOcean doesn’t offer Ubuntu Desktop installations for Droplets, but you can add a GUI to Ubuntu Server.

Here are the simple steps:

• Setup a new Ubuntu droplet with enough resources (it is recommended to have 4 GB of RAM to run Ubuntu Desktop);
• SSH to the new droplet and run:

  $ sudo apt update
  

• Install default Ubuntu Desktop Environment:

  $ sudo apt install ubuntu-desktop
  

• Install XRDP:

  $ sudo apt install xrdp
  

• If you have a firewall make sure that the 3389 port is open:

  $ sudo ufw allow 3389/tcp
  

Reference

• https://www.digitalocean.com/community/questions/how-can-i-create-a-vm-with-ubuntu-desktop-in-digital-ocean
• https://linuxize.com/post/how-to-install-xrdp-on-ubuntu-20-04/
• Environments: https://www.linuxtrainingacademy.com/install-desktop-on-ubuntu-server/