Thanks for getting in touch.
While we don’t have an official step for deploying to Azure Storage containers (yet), we do have community steps that may do what you need.
If you search for “Azure storage” on the steps page, you will see the “Azure Blob Storage Upload” community step that you can install and add. This has been contributed by the community, with the details available here.
If you run into any problems with this step template, we have a Community Slack that may be able to offer some help, but also please keep in mind that these community steps may not be up to date with Azure and may not have official documentation on how to use each field within the step.
We do plan to create an official step and you can track this GitHub issue to be notified when it is available.
If instead you continue with the Azure PowerShell script step approach, in terms of getting the contents of a referenced NuGet package in your step, our documentation on referencing files within a package shows you some examples of how to access these paths in PowerShell. This will give you a path to the extracted package contents.
Hope this helps.