Building & using Node Alpine docker image

Dockerfile

# Runtime image
# Following https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md
FROM node:7.7-alpine

# Add tini
RUN apk add --no-cache tini
ENTRYPOINT ["/sbin/tini", "--"]

WORKDIR /usr/src/app/

# Copy built application modules
COPY ./src/ ./node_modules/

# Copy application files
COPY . ./

CMD [ "node", "service/start.js" ]

Dockerfile.build

# Build image
FROM node:7.7-alpine

# Enables colored output in jenkins logs
ENV FORCE_COLOR=true \
    TERM=xterm \
    CI=true

# Set npm auth token
ARG NPM_TOKEN
RUN echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > ~/.npmrc \
  && echo "progress=false" >> /root/.npmrc \
  && echo "color=true" >> /root/.npmrc

# Create app directory
WORKDIR /usr/src/app/

# Copy package.json and shrinkwrap if present
COPY *.json ./

# Add packages needed to build native dependencies
RUN apk add --no-cache \
    git \
    python \
    python-dev \
    py-pip \
    build-base \
    libc6-compat \
  && pip install virtualenv

# Install modules
RUN npm install --quiet

# Copy over the application code so we can run lint, tests, etc.
COPY . ./