gnouh.Dockerfile

FROM node:12
LABEL author="Huong Nguyen (vnnvanhuong@gmail.com)"

# Use NODE_ENV=production to ensure that
# logging is kept to a minimum
# more caching levels takes
# don’t install dev node_modules
ARG NODE_ENV=production
ARG UID=999
ARG GUI=999

ENV NODE_ENV=${NODE_ENV}

# Use pre-existing "/usr/src/app" rather than create a new dir such as "mkdir /app"
WORKDIR /usr/src/app

# change the uid/gid
RUN groupmod -g ${UID} node && usermod -u ${UID} -g ${GUI} node

# give another name "gnouh" for user "node"
RUN usermod -d /home/gnouh -l gnouh node

# Copy package*.json before copying the source code
# Docker will cache node_modules as a separated layer
# Hence, node_modules is not need to installed again if no change in package.json
COPY package*.json ./

RUN npm ci

COPY . .

EXPOSE 8080

# bypass the package.json's start command
CMD [ "node", "server.js" ]

USER gnouh