Building a Docker Image with Packer

You are a DevOps Engineer in charge of automating all builds. The team in charge of the to-do list application Forethought has been using Dockerfiles to generate their images thus far, but you wish to bring this process under your team using the standardized tool for image creation, Packer.

The application has been provided at /home/cloud_user/packer/forethought. Take the existing setup and reconstruct it to use Packer.

FROM node:10-alpine
RUN mkdir -p /home/node/app/node_modules && chown -R node:node /home/node/app
WORKDIR /home/node/app
COPY package*.json ./
RUN npm config set registry http://registry.npmjs.org/
RUN npm install
COPY --chown=node:node . .
USER node
EXPOSE 8080
CMD [ "node", "index.js" ]