added steps to Jenkins pipeline

Jenkinsfile

@@ -1,38 +1,128 @@
-#!/usr/bin/env groovy
+def TAG
 
 pipeline {
+    options {
+        disableConcurrentBuilds()
+    }
+
+    tools {
+        maven 'mvn_3.6.3'
+    }
 
-    agent any
+    environment {
+        registry = "provectuslabs/kafka-ui-api"
+        registryCredential = 'docker-hub-credentials'
+    }
 
+    agent {
+        kubernetes {
+            label 'kafka-ui'
+            yaml '''
+apiVersion: v1
+kind: Pod
+spec:
+  containers:
+  - name: docker-client
+    image: docker:19.03.1
+    command:
+    - sleep
+    args:
+    - 99d
+    env:
+      - name: DOCKER_HOST
+        value: tcp://localhost:2375
+    volumeMounts:
+      - name: cache
+        mountPath: /tmp/repository
+  - name: docker-daemon
+    image: docker:19.03.1-dind
+    securityContext:
+      privileged: true
+    env:
+      - name: DOCKER_TLS_CERTDIR
+        value: ""
+    volumeMounts:
+      - name: cache
+        mountPath: /var/lib/docker
+  volumes:
+    - name: cache
+      hostPath:
+        path: /tmp
+        type: Directory
+'''
+        }
+    }
     stages {
-        stage('Test') {
+        stage('Create release branch') {
             steps {
-                echo 'Test...'
-                sh 'ls -la'
+                git 'https://github.com/provectus/kafka-ui.git'
+                sh 'git checkout -b release'
+                sh 'git merge master'
             }
         }
-
-        stage('Merge master') {
+        stage('Build artifact') {
+            steps {
+                container('docker-client') {
+                    sh "docker run -v ${WORKSPACE}:/usr/src/mymaven -v /tmp/repository:/root/.m2/repository -w /usr/src/mymaven maven:3.6.3-jdk-13 /bin/sh -c 'mvn versions:set -DremoveSnapshot && mvn clean install'"
+                }
+            }
+            post {
+                success {
+                    archiveArtifacts(artifacts: '**/target/*.jar', allowEmptyArchive: true)
+                }
+            }
+        }
+        stage('Tag release branch') {
             steps {
                 script {
-                    git 'https://github.com/provectus/kafka-ui.git'
-                    sh 'git checkout release'
-                    sh 'git merge master'
                     pom = readMavenPom file: 'pom.xml'
-                    tag = pom.version.replace("-SNAPSHOT", "")
-                    echo "Building version ${tag}"
-//                    sh "git tag -f v${tag}"
-//                    sh "git push -f --tags"
+                    TAG = pom.version
+//                     sh 'git log $(git describe --tags --abbrev=0)..HEAD --oneline'
+                    sh "git tag -f ${TAG}"
                 }
             }
         }
-        stage('Build') {
-            tools {
-                maven 'mvn_3.6.3'
+        stage('Build docker image') {
+            steps {
+                container('docker-client') {
+                    dir(path: './kafka-ui-api') {
+                        script {
+                            dockerImage = docker.build( registry + ":$TAG", "--build-arg JAR_FILE=*.jar -f Dockerfile ." )
+                        }
+                    }
+                }
             }
+        }
+        stage('Publish docker image') {
             steps {
-                sh 'cd ./kafka-ui-api && ./mvnw clean install -Pprod'
+                container('docker-client') {
+                    script {
+                        docker.withRegistry( '', registryCredential ) {
+                            dockerImage.push()
+                            dockerImage.push('latest')
+                        }
+                    }
+                }
             }
         }
+        stage('Remove unused docker image') {
+            steps{
+                container('docker-client') {
+                    sh "docker rmi $registry:$TAG"
+                }
+            }
+        }
+        stage('Tag release') {
+            steps {
+                script {
+                    sh "git push -f --tags"
+                }
+            }
+        }
+    }
+    post {
+        always {
+            cleanWs()
+        }
     }
 }