ASP.NET 5 (vNext) Deployment via TFS 2015 - msbuild

Question

We're trying to work through the new tool chain for building and deploying an ASP.NET 5 (vNext) CoreCLR web site to a server cluster. Between the new compilation changes and the changes to TFS, I'm not sure how everything now gets built and deployed. The scenario is as follows:
On-premise TFS for source control and build agent
Targeting ASP.NET 5 under CoreCLR, hosted via IIS
Questions are:
Using TFS for continuous integration builds (and hopefully deployment to an on-premise IIS server), how does one build and deploy this new application type?
It seems like MSBuild might still be usable to point at a .sln file so as to indirectly invoke dnu.exe, is that correct? Is that the appropriate way to do that now?
Should we be running a scripted build task instead to run dnu.exe instead?
How are these new CoreCLR builds deployed? Just a straight copy to a directory on a remote machine?
This is a new application and we're using a multi-layered application architecture, where the DAL and Business logic are in their own CoreCLR projects, if that makes a difference.
Thanks in advance for shedding some light on the situation.

Answer 1

Here is what we ended up doing:
Powershell script "prebuild.ps1" as per the previous answer and Microsoft deployment guidelines: https://msdn.microsoft.com/en-us/Library/vs/alm/Build/azure/deploy-aspnet5
Vanilla MSBuild build. no switches or special settings.
Powershell script to execute xUnit test runner. We used guidance from this post at http://fluentbytes.com/running-xunit-test-with-asp-net-dnx-and-tfs-2015-build/
Powershell script to run "dnu publish". This creates a directory of the entire web application's structure.
"Windows File Copy" task to deploy the directory structure created in #4 to all of the target machines in the test environment.

Answer 2

To build and deploy ASP.NET 5 via TFS2015 vNext build system, you need to:
1). Create a PowerShell script (named Prebuild.ps1, for example) to install DNX. Details of the PowerShell script can be found: https://msdn.microsoft.com/en-us/Library/vs/alm/Build/azure/deploy-aspnet5 . Add the script file into TFS version control.
2). Add the PowerShell script build step into build definition. Run the Prebuild.ps1 script in this step:
3). In the MSBuild step, specify the project needs to be built, and add the following /p:DeployOnBuild=True /p:DeployTarget=MSDeployPublish /p:CreatePackageOnPublish=True /p:MSDeployPublishMethod=InProc /p:MsDeployServiceUrl=localhost /p:DeployIisAppPath="Default Web Site/TFSTest1" /p:VisualStudioVersion=14.0 to publish the project to IIS.