Background workers can consist of any application code you like. As far as App Platform is concerned, they are the same as services, except they are not “routable,” i.e. they are not accessible via an external URL.
Select the source code for the Worker on GitHub. If connecting for the first time, you will see an empty repository list and will need to click the link labeled Configure your GitHub permissions, then refresh this page.
Next, give the Worker a name and select which branch of the source repo you'd like to use as the source of the Worker. Click Next.
App Platform will inspect the code and select an appropriate runtime environment (such as Node, Ruby, etc). If you need to override this, you can see if there is a better options in the drop-down labeled Type as well. If nothing suitable appears there, upload a Dockerfile to your branch and restart the app creation process.
App Platform will also display any appropriate build and run commands that it detected, which you can now customize as needed.
If the use of environment variables is required, click Edit and supply them. Click the Encrypt checkbox to ensure a variable's value is obscured in all build, deploy, and application logs.
Select a plan, and click Launch Worker.
Go to https://cloud.digitalocean.com/apps, click on your app, and click on the Components tab. Click the Worker you'd like to edit.
Go to https://cloud.digitalocean.com/apps, click on your app, and click on the Components tab. Click on the Worker you'd like to destroy.
You can destroy the Worker by clicking the Destroy Component button on the bottom of the page and entering its name to confirm your selection.