A great Dockerfile for Node.js with Typescript and Yarn (multi-step build) and NPM Token for private modules

Dockerfile

##
# First stage: prepare image
FROM node:12-alpine AS base
ARG NPM_TOKEN
ARG WORKDIR=/usr/src/app
WORKDIR ${WORKDIR}

# Install container build dependencies
RUN apk --no-cache add g++ ca-certificates lz4-dev musl-dev openssl-dev \
  make python gcc zlib-dev libc-dev bsd-compat-headers py-setuptools git bash

# Install npm build dependencies
COPY package.json yarn.lock ./
RUN echo "//registry.npmjs.org/:_authToken=${NPM_TOKEN}" > .npmrc
RUN yarn install --frozen-lockfile


##
# Second stage: build app
FROM base AS build
ARG WORKDIR=/usr/src/app
WORKDIR ${WORKDIR}

# Build
COPY . ./
ENV NODE_ENV=production
RUN yarn build


##
# Third stage: run app
FROM base AS release
ARG WORKDIR=/usr/src/app
WORKDIR ${WORKDIR}

# Get "compiled" files
COPY --from=build ${WORKDIR} ./

EXPOSE 4000
ENV NODE_ENV=production
CMD [ "yarn", "start" ]