Set up CI with Azure Pipelines

[skip ci]

azure-pipelines.yml

@@ -0,0 +1,15 @@
+pool: "Azure Pipelines"
+trigger:
+  - main
+jobs:
+  - job: "gradle"
+    displayName: "gradle job"
+    steps:
+      - task: "Gradle@3"
+        inputs:
+          
+          gradleWrapperFile: 'gradlew'
+          tasks: 'build'
+          publishJUnitResults: true
+          testResultsFiles: '**/TEST-*.xml'
+