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