Add mail notification to Jenkinsfile

tests/API-dhcp/Jenkinsfile

@@ -48,4 +48,21 @@ pipeline {
             }
         }
     }
+    post {
+        always {
+            script {
+                def commiterEmail = sh(script: 'git log -1 --pretty=format:%ae', returnStdout: true).trim()
+                emailext(
+                    to: "${committerEmail}",
+                    subject: "Jenkins Job Completed: ${env.JOB_NAME} #${env.BUILD_NUMBER}",
+                    body: """
+                        El job '${env.JOB_NAME}' con número de build ${env.BUILD_NUMBER} ha finalizado.
+                        
+                        Estado: ${currentBuild.currentResult}
+                        
+                        Revisa los detalles del build en: ${env.BUILD_URL}
+                    """
+            }
+        }
+    }
 }