Docker NPM Install Not working - asp.net

Question

I want to expose my asp.net core application in docker. However i can't get NPM to work. I tried the following below but i get the message that NPM is not found. However i installed nodejs, so i guess it should be available.
Any idea what i'm doing wrong ?
FROM microsoft/aspnet:1.0.0-rc1-update1-coreclr
ADD package.json /tmp/package.json
RUN printf "deb http://ftp.us.debian.org/debian jessie main\n" >> /etc/apt/sources.list
RUN apt-get -qq update && apt-get install -qqy sqlite3 libsqlite3-dev && rm -rf /var/lib/apt/lists/*
RUN apt-get update
RUN apt-get -y install nodejs && cd /tmp && npm install
COPY . /app
WORKDIR /app
RUN ["dnu", "restore"]
EXPOSE 5001/tcp
ENTRYPOINT ["dnx", "-p", "project.json", "web"]

Answer 1

Older versions of Node did not have npm bundled with them. On some Linux distributions, the version of Node in the repository is quite old e.g. on centos it is something like 0.10.7.
It is likely that your application requires a certain version of nodejs to be installed. If this is so, you will need to add the relevant repository to your virtual machine as part of the dockerfile before running
apt-get -y install nodejs
This link gives some details of how to do this on your distribution:
https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions.
If on the other hand you are happy with whatever version of Node your distribution has in its repo, then Suresh Koya's answer is fine.

Answer 2

On linux npm has to be installed separate than nodejs.
You need to add:
RUN apt-get -y install npm
http://blog.teamtreehouse.com/install-node-js-npm-linux

Answer 3

As you can see here:
https://hub.docker.com/r/microsoft/aspnet/~/dockerfile/
FROM mono:4.0.1
mono:4.0.1:
FROM debian:wheezy
Why do you use the jessie ?
RUN printf "deb http://ftp.us.debian.org/debian jessie main\n" >> /etc/apt/sources.list
FROM microsoft/aspnet:1.0.0-rc1-update1-coreclr
ADD package.json /tmp/package.json
RUN printf "deb http://ftp.us.debian.org/debian jessie main\n" >> /etc/apt/sources.list
RUN apt-get -qq update && apt-get install -qqy sqlite3 libsqlite3-dev && \
apt-get -y install nodejs npm && cd /tmp && npm install && \
rm -rf /var/lib/apt/lists/*
COPY . /app
WORKDIR /app
RUN ["dnu", "restore"]
EXPOSE 5001/tcp
ENTRYPOINT ["dnx", "-p", "project.json", "web"]