Update 'Jenkinsfile'

add sendMail as post build action

Jenkinsfile

@@ -45,6 +45,22 @@ pipeline {
          sh "docker rmi $imagename:latest"
 
       }
-    }
+    }    
   }
+            // post-build actions
+    post {
+        success {
+            echo 'The docker pipeline worked!'
+            emailext to: 'jenkinsbuilds@d4science.org',
+                    subject: "[Jenkins DockerPipeline D4S] build ${currentBuild.fullDisplayName} worked",
+                    body: "Build time: ${currentBuild.durationString}. See ${env.BUILD_URL}"
+        }
+        failure {
+            echo 'The docker pipeline has failed'
+            emailext attachLog: true,
+                    to: 'jenkinsbuilds@d4science.org',
+                    subject: "[Jenkins DockerPipeline D4S] build ${currentBuild.fullDisplayName} failed for image  ${imagename}",
+                    body: "Something is wrong with ${env.BUILD_URL}"
+        }
+    }
 }