Update Jenkinsfile

Jenkinsfile

 pipeline {
     agent any
     stages {
+        stage('init') {
+            script {
+                env.imageTag = sh (script: 'git rev-parse --short HEAD ${GIT_COMMIT}', returnStdout: true).trim()
+            }
+        }
         stage('Build') {
             steps {
                 sh '/var/jenkins_home/plugins/apache-maven-3.6.3/bin/mvn clean package'
@@ -8,13 +13,13 @@ pipeline {
         }
         stage('Build image') {
             steps {
-                sh 'docker build -t registry.lizhi.co/registry/pybbs:${BUILD_NUMBER} .'
-                sh 'docker push  registry.lizhi.co/registry/pybbs:${BUILD_NUMBER}'
+                sh 'docker build -t registry.lizhi.co/registry/pybbs:${imageTag} .'
+                sh 'docker push  registry.lizhi.co/registry/pybbs:${imageTag}'
             }
         }
 		stage('deploy') {
             steps {
-                sh 'sed -i "s#registry/pybbs#registry/pybbs:${BUILD_NUMBER}#g" docker-compose.yml'
+                sh 'sed -i "s#registry/pybbs#registry/pybbs:${imageTag}#g" docker-compose.yml'
                 sh 'scp ./docker-compose.yml 10.10.10.115:/app'
                 sh 'ssh 10.10.10.115 "cd /app ; docker-compose down && docker-compose up -d "'
             }