If you call MS build in the following manner for instance:
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe TestApp.csproj /p:Configuration=Release /t:Package
by specifying the target "Package" you command MS to package the website.
It will proceed to build and package your website into an MSDEPLOY package (specific zip file layout).
the output from the sample build is actually very helpful and gives you clues as to where to go next, for example it tells us where it created the file:
Package "TestApp.zip" is successfully created as single file at the following location:
file:///C:/TestApp/obj/Release/Package
It also gives us a link to find out more:
To get the instructions on how to deploy the web package please visit the following link:
http://go.microsoft.com/fwlink/?LinkId=124618
Then it shows you where it created a sample .cmd file for deploying the package
Sample script for deploying this package is generated at the following location:
C:\TestApp\obj\Release\Package\TestApp.deploy.cmd
For this sample script, you can change the deploy parameters by changing the following file:
C:\TestApp\obj\Release\Package\TestApp.SetParameters.xml
Done Building Project "C:\TestApp\TestApp.csproj" (Package target(s)).
this should get you started in creating and executing happy deployments.