Add a jenkinsfile with build instructions

Jenkinsfile

@@ -0,0 +1,50 @@
+pipeline {
+    agent any
+
+    options {
+        buildDiscarder(
+            logRotator(
+                numToKeepStr: '5'
+            )
+        )
+    }
+
+    stages {
+        stage("Build on Linux") {
+            agent {
+                label 'linux'
+            }
+
+            tools {
+                jdk "jdk17"
+            }
+
+            steps {
+                script {
+                    sh '''
+                    #!/bin/bash
+
+                    git clean -xfd
+                    git reset --hard
+                    git fetch
+
+                    java -version
+
+                    chmod +x gradlew
+                    ./gradlew -Dorg.gradle.java.home="$JAVA_HOME" build publish
+
+                    '''
+                }
+            }
+
+            post {
+                always {
+                    archiveArtifacts artifacts: "build/libs/*.jar"
+                    deleteDir()
+                }
+            }
+
+
+        }
+    }
+}