feature/add-jenkinsfile (#114)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Co-authored-by: Michael Hönnig <michael@hoennig.de>
Reviewed-on: https://dev.hostsharing.net/hostsharing/hs.hsadmin.ng/pulls/114
Reviewed-by: Timotheus Pokorra <timotheus.pokorra@hostsharing.net>

Jenkinsfile

@@ -0,0 +1,52 @@
+pipeline {
+    agent {
+        dockerfile {
+            filename 'etc/jenkinsAgent.Dockerfile'
+            // additionalBuildArgs  ...
+            args '--network=bridge --user root -v $PWD:$PWD -v /var/run/docker.sock:/var/run/docker.sock --group-add 984'
+            reuseNode true
+       }
+    }
+
+    environment {
+        DOCKER_HOST = 'unix:///var/run/docker.sock'
+        HSADMINNG_POSTGRES_ADMIN_USERNAME = 'admin'
+        HSADMINNG_POSTGRES_RESTRICTED_USERNAME = 'restricted'
+        HSADMINNG_MIGRATION_DATA_PATH = 'migration'
+    }
+
+    triggers {
+        pollSCM('H/1 * * * *')
+    }
+
+    stages {
+        stage('Checkout') {
+            steps {
+                checkout scm
+            }
+        }
+
+        stage ('Compile & Test') {
+            steps {
+                sh './gradlew clean check --no-daemon -x pitest -x dependencyCheckAnalyze'
+            }
+        }
+    }
+
+    post {
+        always {
+            // archive test results
+            junit 'build/test-results/test/*.xml'
+
+            // archive the JaCoCo coverage report in XML and HTML format
+            jacoco(
+                execPattern: 'build/jacoco/*.exec',
+                classPattern: 'build/classes/java/main',
+                sourcePattern: 'src/main/java'
+            )
+
+            // cleanup workspace
+            cleanWs()
+        }
+    }
+}