Dockerfile.dev

FROM node:16-alpine

#We are specifying that the USER which will execute RUN, CMD, or ENTRYPOINT instructions will be the node user, as opposed to root (default).
USER node

#We are then creating a directory of /home/node/app prior to the WORKDIR instruction. This will prevent a permissions issue since WORKDIR by default will create a directory if it does not exist and set ownership to root.
RUN mkdir -p home/node/app
WORKDIR home/node/app

#The inline chown commands will set ownership of the files you are copying from your local environment to the node user in the container
COPY --chown=node:node ./package.json ./
RUN npm install
COPY --chown=node:node ./ ./

CMD ["npm", "start"]