在 Docker 映像中更新 npm

Question

我正在构建一个 Node.js Docker 映像：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.

但是我已经更新了 Node.js 版本，但它仍然无法工作：

node -v
v8.9.3
npm -v
5.6.0

我已经运行了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？我可以使用 node 运行应用程序就好了。

我正在运行 Ubuntu 16.04.3 LTS

Answer 1

在 Dockerfile 中，我使用了最新的 alpine 版本 FROM alpine:3.7，它可以工作。

Answer 2

在构建映像之前，您必须运行 docker image pull node 以在本地下载最新的节点（包括 npm）映像。

希望有帮助！