ffmpeg-tutorial | A set of tutorials that demonstrates how to write a video | Video Player library

I have followed Azure Batch ffmpeg tutorial and it works as expected. The problem that I have at this point is that my executable that i want to run as a batch is a dotnet core application and images that are available when creating a Pool do not have dot net core installed. In the task command line I need to run something like dotnet myApp.dll myParam but dotnet is not available.

How do I go about having an image that has dotnet core installed. Do I need to create a custom image? Is there a tutorial for doing that. I tried using Docker with dotnetcore runtime image at some point for running the same application locally and that seems to work. Do I need to export this image to Azure somehow? Or can I push the core installation into an image in another way?

Thanks.