Add a Jenkinsfile

Signed-off-by: Andrew Berezovskyi <andriib@kth.se>

Jenkinsfile

@@ -0,0 +1,32 @@
+pipeline {
+    agent any
+    tools {
+        maven 'apache-maven-latest'
+        jdk 'temurin-jdk11-latest'
+    }
+    stages {
+        stage('Build') {
+            steps {
+                sh '''
+                    java -version
+                    mvn -v
+                '''
+            }
+        }
+    }
+    post {
+        // send a mail on unsuccessful and fixed builds
+        unsuccessful { // means unstable || failure || aborted
+            emailext subject: 'Build $BUILD_STATUS $PROJECT_NAME #$BUILD_NUMBER!',
+            body: '''Check console output at $BUILD_URL to view the results.''',
+            recipientProviders: [culprits(), requestor()],
+            to: 'andrew+ham@berezovskyi.me'
+        }
+        fixed { // back to normal
+            emailext subject: 'Build $BUILD_STATUS $PROJECT_NAME #$BUILD_NUMBER!',
+            body: '''Check console output at $BUILD_URL to view the results.''',
+            recipientProviders: [culprits(), requestor()],
+            to: 'andrew+ham@berezovskyi.me'
+        }
+    }
+}