This guide covers essential Docker commands and concepts, including:

• Building images
• Running containers
• Managing processes
• Cleaning up resources

It provides a clear understanding of the core Docker workflow with simple examples, enabling you to start building and running containerized applications confidently.

1. Build Docker Image

Create the image from your Dockerfile:

docker build -imagename(anyname) .

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2. Run Docker Container

Start a container from the image:

docker run -p 3000:3000 imagename(anyname)

Port mapping:

• 3000:3000 = local machine → container

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3. List Containers

docker ps -a

Shows all containers (running + stopped)

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4. Stop a Running Container

docker stop <container_id>

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5. Remove a Container.

docker rm <container_id>

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6. Remove Docker Image.

By name:

bash docker rmi dirname

### By image ID:
 ```bash
docker rmi <image_id>

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Quick Flow (Important to remember)

build → run → list → stop → remove container → remove image