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create docker

Simple docker step by step how to create docker with explanation

Creating Docker involves a few easy-to-follow steps, all aimed at streamifying your software development process. Let’s take a systematic walkthrough.

Step 1: Installation

To start with, you’ll need to download Docker. Head to the Docker website, download Docker Desktop, and follow the installation instructions for your particular operating system.

Step 2: Setup

Once installed, you need to start Docker. On Mac, you click on Docker.app in the Applications folder. On Windows, use the Start menu to access it.

Step 3: Checking the Installation

To ensure that Docker is installed correctly, open a terminal and type in docker version. The output should display the Docker version installed on your system.

Step 4: Docker Account

Having a Docker account allows you to share your containers with the public or keep them private. Hence, sign up for a Docker account if you do not have one already.

Step 5: Docker Image

Use a Docker image, which is essentially an executable package that includes everything needed to run an application. The Docker image can be bought from the Docker store or created. To create a Docker image, a Dockerfile is necessary.

Step 6: Creating a Dockerfile

Create a simple text file named ‘Dockerfile’ (no extension). This file should start with instructing Docker to pull down a base environment from Docker Hub. It generally looks something like this:

  • FROM node:14
  • WORKDIR /app
  • COPY . .
  • CMD [ “node”, “server.js” ]

Save this Dockerfile in the same folder as your server.js file.

Step 7: Building Docker Image

Build your Docker image by opening a terminal and navigating to the folder containing the Dockerfile and run this command docker build -t your-image-name ..

Step 8: Running Docker Image

Use the command docker run -p 4000:80 your-image-name to run your Docker image.

Step 9: Pushing Docker Image to Docker Hub

Push the image you created to Docker Hub using docker push your-image-name.

Those are the basic steps to build and use Docker images. With Docker, you ensure that your application runs smoothly in any environment.

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