Add Jenkinsfile for the Jenkins pipeline process

Jenkinsfile

@@ -0,0 +1,21 @@
+node {
+    stage 'Checkout'
+    git 'https://github.com/ATLauncher/ATLauncher.git'
+
+    stage 'Setup'
+    def maven = docker.image('ryantheallmighty/maven-custom');
+    maven.pull();
+
+    stage 'Test'
+    maven.inside('-v /m2repo:/m2repo') {
+        sh 'mvn -Dmaven.repo.local=/m2repo clean test'
+    }
+
+    stage 'Build'
+    maven.inside('-v /m2repo:/m2repo') {
+        sh 'mvn -Dmaven.repo.local=/m2repo -DskipTests clean install'
+    }
+
+    stage 'Archive'
+    archive 'target/ATLauncher-*.exe,target/ATLauncher-*.zip,target/ATLauncher-*.jar'
+}