Added Jenskinsfile.

Jenkinsfile

@@ -0,0 +1,74 @@
+pipeline {
+    agent {
+        label 'ubuntu'
+    }
+
+    environment {
+        NODE_ENV = 'production'
+    }
+
+    stages {
+        stage('Checkout') {
+            steps {
+                checkout scm
+            }
+        }
+
+        stage('Setup Node.js') {
+            steps {
+                nodejs(nodeJSInstallationName: 'Node23') {
+                    sh 'node -v'
+                    sh 'yarn -v'
+                }
+            }
+        }
+
+        stage('Install Dependencies') {
+            steps {
+                nodejs(nodeJSInstallationName: 'Node23') {
+                    sh 'yarn install --frozen-lockfile --production=false'
+                }
+            }
+        }
+
+        stage('Deploy via SSH') {
+            steps {
+                sshPublisher(publishers: [
+                    sshPublisherDesc(
+                        configName: 'farmcontrol.tombutcher.local',
+                        transfers: [
+                            sshTransfer(
+                                cleanRemote: false,
+                                excludes: 'node_modules/**',
+                                execCommand: '''
+                                    cd /opt/farmcontrol-api
+                                    yarn install --production
+                                    pm2 restart ecosystem.config.js --env production || pm2 start ecosystem.config.js --env production
+                                ''',
+                                execTimeout: 120000,
+                                flatten: false,
+                                makeEmptyDirs: false,
+                                noDefaultExcludes: false,
+                                patternSeparator: '[, ]+',
+                                remoteDirectory: 'farmcontrol-api',
+                                remoteDirectorySDF: false,
+                                removePrefix: '',
+                                sourceFiles: '**/*'
+                            )
+                        ],
+                        usePromotionTimestamp: false,
+                        useWorkspaceInPromotion: false,
+                        verbose: true
+                    )
+                ])
+            }
+        }
+    }
+
+    post {
+        always {
+            cleanWs()
+        }
+    }
+}
+