initial add Azure DevOps

ref #484

azure-pipelines.yml

@@ -0,0 +1,17 @@
+# ASP.NET Core
+# Build and test ASP.NET Core projects targeting .NET Core.
+# Add steps that run tests, create a NuGet package, deploy, and more:
+# https://docs.microsoft.com/azure/devops/pipelines/languages/dotnet-core
+
+trigger:
+- master
+
+pool:
+  vmImage: 'Ubuntu-16.04'
+
+variables:
+  buildConfiguration: 'Release'
+
+steps:
+- script: dotnet build --configuration $(buildConfiguration)
+  displayName: 'dotnet build $(buildConfiguration)'