Docker Dockerfile

FROM ubuntu:20.04 # base image
FROM node:16-alpine # Node.js base
FROM python:3.9-slim # Python base

LABEL [email protected] # set maintainer
LABEL version=1.0 # set version label

WORKDIR /app # set working directory

COPY . /app # copy current dir to /app
COPY package.json /app/ # copy specific file
ADD archive.tar.gz /app # copy and extract

RUN apt-get update # run command during build
RUN npm install # install dependencies
RUN pip install -r requirements.txt # Python dependencies

ENV NODE_ENV=production # set environment variable
ENV PORT=3000 # set port variable

EXPOSE 80 # expose port 80
EXPOSE 3000 8080 # expose multiple ports

USER node # switch to user
USER 1000:1000 # switch by UID:GID

VOLUME /data # create mount point

ENTRYPOINT ["node"] # set entrypoint
CMD ["app.js"] # default command
CMD ["npm", "start"] # start command