To add an Automation Script go to your server -> OPS -> Automation Scripts -> +add new template action. Chose from the available templates and complete the fields available for the template based on your needs, then hit Save changes.
The resulting resource will have an on/off switch. It can also be expanded with the down arrow on the right. Next to it, hit the three vertical dots to Edit or Remove the resource.
To execute the automation script, go to OPS -> Packages & Config -> Deploy. If you have packages added, you can uncheck the box on the right of each one to stop them from being deployed.
To find out more about Automation Scripts, go to the following link: