Example Base Docker File for Node App

base.dockerfile

FROM node:6.10

RUN apt-get update -qq && \
    DEBIAN_FRONTEND=noninteractive apt-get -y upgrade && \
    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

ENV APP_ROOT /usr/src/app
RUN mkdir -p $APP_ROOT && \
    groupadd -r appuser -g 451 && \
    useradd -u 451 -r -g appuser -d $APP_ROOT -s /sbin/nologin -c "Docker image user" appuser && \
    chown -R appuser:appuser $APP_ROOT
WORKDIR $APP_ROOT

USER appuser
ONBUILD ARG NODE_ENV
ONBUILD ENV NODE_ENV $NODE_ENV
ONBUILD COPY package.json $APP_ROOT
ONBUILD RUN npm install && npm cache clean
ONBUILD COPY . $APP_ROOT