Dockfile

# from the node 10 image
FROM node:10

# set the working dir
WORKDIR /usr/src/app

# define the env variables port and host
ENV PORT 8080
ENV HOST 0.0.0.0

# copy the package*.json to the working dir
COPY package*.json ./

# run npm install
RUN npm install --only=production

# copy source code to the working dir
COPY . .

# run npm build
RUN npm run build

# run npm start at PORT
CMD npm start -- -p ${PORT}