Dockerfile - thuy-econsys/rails_app GitHub Wiki

# /Dockerfile

# base image
FROM node:current-slim

# specify the working directory location where commands can be executed 
# otherwise it will be set in the root directory
# /usr/src/app in your image filesystem (never the host’s filesystem)
WORKDIR /usr/src/app

# Copy the file from your host to your current location.
COPY package.json .

# Run the command inside your image filesystem.
RUN npm install

# expose container port at runtime.
# not necessary if index.js is already listening on port 8080 
EXPOSE 8080
	
# Run the specified command, npm start, within the container.
CMD [ "npm", "start" ]
	
# Copy the rest of your app's source code from your host to your image filesystem.
COPY . .

References