Added Jenkinsfile

* Adding Jenkins

* Oops, invalid filename

* Trying it out...

* Test the tests stage

Author: tomansill

Jenkinsfile

@@ -0,0 +1,20 @@
+pipeline {
+    agent { docker { image 'maven:3.3.3' } }
+    stages {
+        stage('Build') {
+            steps {
+                sh 'mvn -B -DskipTests clean package'
+            }
+        }
+        stage('Test') {
+            steps {
+                sh 'mvn test'
+            }
+            post {
+                always {
+                    junit 'target/surefire-reports/*.xml'
+                }
+            }
+        }
+    }
+}