1) download the following template
2) Access "Deploy a Custom Template"
3) we click on the link "Build your own template in the editor"
4) we are shown the following window where we can write our template or load one
5) in our case we are going to load the example that we downloaded
6) a dialog box opens and we select the downloaded file
7) we are shown the message once finished
8) We validate the values of the template are reflected in the form, we click on the "review + Create" button
9) We see the message "Validation Passed"
10) It shows us the screen of the deployment in progress
11) We see the virtual machine created
And that's it!
thank you very much for your attention! :)