Dockerfile

# if you're doing anything beyond your local machine, please pin this to a specific version at https://hub.docker.com/_/node/
# FROM node:8-alpine also works here for a smaller image
FROM node:10.15.0-alpine

RUN apk update
RUN apk fetch openjdk8
RUN apk add openjdk8

# set our node environment, either development or production
# defaults to production, compose overrides this to development on build and run
ARG NODE_ENV=production
ENV NODE_ENV $NODE_ENV

# default to port 3000 for node, and 9229 and 9230 (tests) for debug
#ARG PORT=3000
#ENV PORT $PORT
#EXPOSE $PORT 9229 9230

# you'll likely want the latest npm, regardless of node version, for speed and fixes
# but pin this version for the best stability
RUN npm i npm@latest -g

# install dependencies first, in a different location for easier app bind mounting for local development
WORKDIR /opt
COPY package.json package-lock.json* ./
RUN npm install --no-optional && npm cache clean --force
ENV PATH /opt/node_modules/.bin:$PATH

# check every 30s to ensure this service returns HTTP 200
# HEALTHCHECK --interval=30s CMD node healthcheck.js

# copy in our source code last, as it changes the most
WORKDIR /opt/app
COPY . /opt/app

#COPY docker-entrypoint.sh /usr/local/bin/
#ENTRYPOINT ["docker-entrypoint.sh"]

# the official node image provides an unprivileged user as a security best practice
# https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md#non-root-user
#USER node

# if you want to use npm start instead, then use `docker run --init in production`
# so that signals are passed properly. Note the code in index.js is needed to catch Docker signals
# using node here is still more graceful stopping then npm with --init afaik
# I still can't come up with a good production way to run with npm and graceful shutdown
RUN npm run build
CMD [ "node", "dist/index.js" ]