更新Docker镜像中的npm

我构build了一个Node.js的Docker镜像: docker build . -t imagename docker build . -t imagename ,但是我不断收到有关npm版本的警告

 npm WARN deprecated This version of npm lacks support for important features, npm WARN deprecated such as scoped packages, offered by the primary npm npm WARN deprecated registry. Consider upgrading to at least npm@2, if not the npm WARN deprecated latest stable version. To upgrade to npm@2, run: npm WARN deprecated npm WARN deprecated npm -g install npm@latest-2 npm WARN deprecated npm WARN deprecated To upgrade to the latest stable version, run: npm WARN deprecated npm WARN deprecated npm -g install npm@latest npm WARN deprecated npm WARN deprecated (Depending on how Node.js was installed on your system, you npm WARN deprecated may need to prefix the preceding commands with `sudo`, or if npm WARN deprecated on Windows, run them from an Administrator prompt.) npm WARN deprecated npm WARN deprecated If you're running the version of npm bundled with npm WARN deprecated Node.js 0.10 LTS, be aware that the next version of 0.10 LTS npm WARN deprecated will be bundled with a version of npm@2, which has some small npm WARN deprecated backwards-incompatible changes made to `npm run-script` and npm WARN deprecated semver behavior. 

不过,我已经更新Node.js版本,它仍然无法正常工作:

 node -v v8.9.3 npm -v 5.6.0 

我已经运行npm -g install npm@latest但仍然无法运行。

Dockerfile

 FROM alpine:3.1 # Update RUN apk add --update nodejs # Install app dependencies COPY package.json /src/package.json RUN cd /src; npm -g install npm@latest # Bundle app source COPY . /src CMD ["node", "--harmony","/src/app.js"] 

可能是什么原因? 我能够使用节点运行应用程序就好了。

我正在运行Ubuntu 16.04.3 LTS

在Dockerfile中,我使用了最新的阿尔卑斯山版本FROM alpine:3.7代替,它的工作原理。