Docker

What is Docker?

Docker packages an application together with everything it needs to run (code, tools, settings, libraries) into a neat little box called a container.

• Container → A self-contained app package

• Image → The blueprint used to create containers

• Docker Desktop → The app you install to use Docker easily

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Install Docker on Mac

1. Go to the Docker website

2. Download Docker Desktop for Mac

3. Open the downloaded file

4. Drag Docker into your Applications folder

5. Open Docker from Applications

6. Wait for it to start (you’ll see a whale icon in the menu bar)

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Install Docker on Windows

1. Go to the Docker website

2. Download Docker Desktop for Windows

3. Run the installer

4. Follow the prompts (you can keep default settings)

5. Restart your computer if asked

6. Open Docker Desktop

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Check That It Works

After installing, test Docker:

docker --version

If you see a version number, you’re good to go

Push a Docker Image

Build

docker build -t my-app .

Tag

docker tag my-app your_dockerhub_username/my-app:latest

Push

docker push your_dockerhub_username/my-app:latest

Pull a Docker Image

docker pull your_dockerhub_username/my-app:latest