Dockerfile

# pull the Node.js Docker image
FROM node:12.15.0

# create the directory inside the container
WORKDIR /usr/src/app

# This line is not necesary because we are using volumes
# copy the package.json files from local machine to the workdir in container
# COPY package*.json ./

# run npm install in our local machine
RUN npm install --quiet
RUN npm install -g nodemon

# This line is not necesary because we are using volumes
# Copy local directory to container - remove if using volumes in docker-compose.yml
# COPY . /usr/src/app

# our app is running on port 5000 within the container, so need to expose it
EXPOSE 5001

# the command that starts our app
CMD ["nodemon", "index.js", "--exec", "babel-node", "-e", "js"]