Add build.cmd file (#31)

build.cmd

@@ -0,0 +1,16 @@
+:: Example script for building without the full Visual Studio
+
+:: Install prerequisites using chocolately package manager
+choco install -y visualstudio2019buildtools --package-parameters "--add Microsoft.VisualStudio.Workload.VCTools;includeRecommended" nuget.commandline nunit-console-runner
+
+:: Add build tools to path
+IF "'%VSINSTALLDIR%'" EQU "''" (call "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Auxiliary\Build\vcvars64.bat") else (echo "vcvars already set")
+
+:: Restore nuget packages
+nuget restore
+
+:: Build debug version of the project
+msbuild duo_api_csharp.sln /p:Configuration=Debug /p:Platform="Any CPU"
+
+:: Run unit tests
+vstest.console.exe .\test\bin\Debug\DuoApiTest.dll