dockerfile express and react example

Example: express react docker container example

# Use a lighter version of Node as a parent imageFROM mhart/alpine-node:8.11.4# Set the working directory to /clientWORKDIR /client# copy package.json into the container at /clientCOPY package*.json /client/# install dependenciesRUN npm install# Copy the current directory contents into the container at /clientCOPY . /client/# Make port 3000 available to the world outside this containerEXPOSE 3000# Run the app when the container launchesCMD ["npm", "start"]