Dockerfile
# use an official node runtime as the base image
FROM node:16-alpine
# set the (container) working directory
WORKDIR /app
# copy current (local) directory contents into the container
COPY . /app
# install dependencies
RUN npm install -g create-react-app && npm install
# make port available to the world outside this container
EXPOSE 3000
# run when the container launches
CMD ["npm", "start"]