Dockerfile

FROM ubuntu:14.04
MAINTAINER Erik Axelsson <erikaxelsson1@gmail.com>

# install our dependencies and nodejs
RUN echo "deb http://archive.ubuntu.com/ubuntu trusty main universe" > /etc/apt/sources.list
RUN echo "deb http://ppa.launchpad.net/chris-lea/node.js/ubuntu trusty main " > /etc/apt/sources.list
RUN apt-get update
RUN apt-get -y install nodejs

# use changes to package.json to force Docker not to use the cache
# when we change our application's nodejs dependencies:
ADD package.json /tmp/package.json
RUN cd /tmp && npm install
RUN mkdir -p /opt/app && cp -a /tmp/node_modules /opt/app/

# From here we load our application's code in, therefore the previous docker
# "layer" thats been cached will be used if possible
WORKDIR /opt/app
ADD . /opt/app

EXPOSE 3000

CMD ["node", "app.js"]