我在亚马逊AWS弹性豆茎中创建了一个NodeJS应用程序。每次我部署应用程序时，我都会收到以下错误（在日志中）：

2016-09-06T15:56:48.332Z] INFO  [17369] : Command processor returning results: 
{"status":"FAILURE","api_version":"1.0","results":[{"status":"FAILURE","msg":"/bin/sh: npm: command not found. \ncontainer_command 01-install-dependencies in .ebextensions/install.config failed. For more detail, check /var/log/eb-activity.log using console or EB CLI","returncode":127,"events":[]}]}

知道是什么引起的吗？