Target did not produce any files, or the path is incorrect.

Describe the bug I have configured my azure.json file with the correct values according to the AzureJSON interface (using the ng add @azure/ng-deploy command). When I try to run ng run <project-name>:deploy I get told that my path is empty (which it isn't). It then runs my build command and once again complains that my path is empty (which it isn't).

I also noticed that getFiles ignores directories https://github.com/Azure/ng-deploy-azure/blob/master/src/builders/actions/deploy.ts#L121. I have an assets folder in my build directory that should be included in the deployment.

My Angular application has multiple projects (app + libraries), if that bears any relevance.

To Reproduce Steps to reproduce the behavior:

1. Create an angular app with projects.
2. Try to deploy a project.

Expected behavior ng run <project-name>:deploy should deploy my project compiled in the directory specified in azure.json.hosting[0].app.path.

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