Dockerize node app
Feb 23, 2017 · 1 min read
Steps to dockerize an node app:
- Create a new file in your project directory named “Dockerfile”
- This file will hold the configuration for your docker image
- The content of the Dockerfile is :
#node:latest is the image name.
FROM node:latest
# Create app directory
RUN mkdir -p /opt/my-app
WORKDIR /opt/my-app
# Copy package.json file to the image
COPY package.json /opt/my-app
#Install app dependencies
RUN npm install
# Bundle app source
COPY . /opt/my-app
#Expose the node port
EXPOSE 3000
#Setup the command to be run when the container from that image start
CMD [ “npm”, “start” ]
- To build the image run this command: “docker build -t <username>/<app-name> .”
- To push the image to the public docker hub signup https://hub.docker.com/
- Login through the cli using this command “docker login”
- Tag the built image using this command “docker tag <username>/<app-name>:<version>”
- Push the tagged image to the public hub “docker push <username>/<app-name>:<version>”
- Login to https://hub.docker.com/ and you will find the pushed image