How to Dockerize a Project
sources: Docker’s Website, Tutorial from Node.js
Basic steps:
- create a Dockerfile in the base directory of the project
- create a .dockerignore file in that same directory
- build the image and run it
Creating a Dockerfile
# this grabs the official node docker image from https://hub.docker.com/_/node/
# the image has the basic setup for the environment you want (specifically npm)
FROM node:8
# Create a working directory for the application
WORKDIR /usr/src/app
# Install app dependencies (you have to move all your requirements files into the working directory first)
COPY package*.json ./
RUN npm install
# Bundle app source (I'm still not quite sure what that means)
COPY . .
# run your application!
EXPOSE 8080
CMD [ "npm", "start" ]
Creating a .dockerignore file
This is pretty straightforward. Just create a .dockerignore file with everything you don’t want to include in your published image. In this case, the following file names:
node-modulesnpm-debug.log
Build and run the image
To build the scooter-app image under the username nnwogwugwu:
- docker build -t nnwogwugwu/scooter-app .
To run the dockerized scooter app:
- docker run -p 49160:3000 -d nnwogwugwu/scooter-app
Note: the -d flag runs the docker image in the background. the -p flag lets you specify the port. Use it to map a public port to the private port in your container. The Node.js article uses 49160:8080, since the node application uses port 8080. Create-react-app defaults to port 3000, so make sure to keep that in mind.
To view the dockerized application, go to http://localhost:49160/