hello-docker

Hello world in node, with docker

Getting Started

Make sure you have docker installed on your local system. Test to see if you have output from the following command. Also install node.

$ docker -v

$ node -v

Node hello world with express

To install express, already included in the package run:

npm install

Then run the basic app.

node index.js

And now you can visit localhost:3000 and you should see something like

Hello World! You have visited this app x times!

Dockerfile

The Dockerfile contains the necessary setup for running this app from scratch. In this case, just running npm install and then copying output to the main app directory inside the container.

Building

$ docker build -t hello-docker .

Then check the images to make sure it is built.

$ docker image ls

Running

Use docker run, plus the -p flag to map a port. The port maps your local port to the internal docker port. In this case, they are the same.

$ docker run -p 3000:3000 hello-docker

To see which containers are running, from another terminal.

$ docker container ls

Then stop it with:

$ docker stop <container id>

Try from dockerhub

Optionally, try my docker image. This will auto pull it too.

$ docker run -p 3000:3000 bparra/hello-docker:v1