👷 Add jenkinsfile

Jenkinsfile

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+pipeline {
+    agent any
+
+    stages {
+        stage('Set Image Name') {
+            steps {
+                script {
+                    env.IMAGE = "harbor.dinauer.dev/kubooboo/frontend:${env.BUILD_NUMBER}";
+                }
+            }
+        }
+        stage('Build Image') {
+            steps {
+                script {
+                    sh "docker build --no-cache -t ${env.IMAGE} ."
+                }
+            }
+        }
+        stage('Push Image to Docker Hub') {
+            steps {
+                script {
+                    withCredentials([usernamePassword(credentialsId: 'harbor', usernameVariable: 'USERNAME', passwordVariable: 'PASSWORD')]) {
+                        sh 'echo ${PASSWORD} | docker login harbor.dinauer.dev -u ${USERNAME} --password-stdin'
+                        sh "docker push ${env.IMAGE}"
+                        sh "docker logout harbor.dinauer.dev"
+                    }
+                }
+            }
+        }
+    }
+}