title: Deploying .net core app to Ubuntu using VSTS
body: <p>I have an Azure Service Fabric app with a bunch of .net core 2.1 services, all happily deploying to a windows cluster. I haven't created the Ubuntu service fabric instance yet, but wanted to understand the processes involved first.</p>
  
  <p>I'd now like to experiment with pushing out the app to an Ubuntu Service Fabric cluster. To this end I have added the Ubuntu runtime identifier to the .csproj (it now has Ubuntu and win7-64 declared). </p>
  
  <p>Can someone tell me if I need to do something in my VSTS build when building/packaging the service fabric app? Presumably the build process needs to know that I want to deploy to an Ubuntu cluster rather than Windows?</p>