adding initial build-master.yml

build/build-master.yml

@@ -0,0 +1,14 @@
+trigger:
+- master
+
+pool:
+  vmImage: 'macos-latest'
+
+steps:
+- script: echo Hello, world!
+  displayName: 'Run a one-line script'
+
+- script: |
+    echo Add other tasks to build, test, and deploy your project.
+    echo See https://aka.ms/yaml
+  displayName: 'Run a multi-line script'