Creating a Docker container for a NodeJs application

This is a simple Docker tutorial for creating your first NodeJs container, above is the vid and below you will find the steps followed.

Steps

Pre-reqs

Have node.js installed
And docker installed

Create an incredibly simple node app
Create your first container
Build and Run your new container

Create your simple node app

npm init
create the index.js

Create a dockerfile

Include container with node preinstalled:

FROM node

Create default/working directory:

WORKDIR /usr/src/app

Copy package.json to workdir and install dependencies (not really needed for this app but you might need it😊):

COPY package.json .
RUN npm install

Copy the rest of the app (just the index.js file in this case)

COPY . .

Add a command to run when this container is started

CMD ["node", "index.js"]

Build & Run

Build the container:

docker build -t my-node-app .

Run the container

docker run my-node-app

Resources

Dockerizing a Node.js web app

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