Update 'Jenkinsfile'

Jenkinsfile

@@ -11,7 +11,7 @@ pipeline{
 					docker.withRegistry('https://docker.snppla.net', 'nexus_push'){
 						def customImage = docker.build("docker.snppla.net/snppla/gogs:${env.GIT_BRANCH}", "--pull ./")
 						customImage.push()
-						sh env
+						sh "env"
 					}
 				}
 			}