如果branch是master，推送为latest镜像

src/org/qg/docker/StageBucket.groovy

@@ -217,7 +217,8 @@ def dockerbuild_and_push(buildNumber, branchName, harborGroup, systemName, conte
         withDockerRegistry([credentialsId: 'harbor-qajenkins', url: "http://192.168.4.36"]) {
             def image = docker.build(imageTag, "--build-arg BUILD_NUMBER=${buildNumber} --build-arg SYSTEM_NAME=${systemName} --build-arg BRANCH_NAME=${branchName} --build-arg SAFE_SYSTEM_NAME=${safeSystemName} ${contextDir}")
             image.push()
-            image.push('latest')
+            if branchName == "master":
+                image.push('latest')
         }
     }