[Container] Building and Running Container Images

Steps to create and run containers:

1. Create a Dockerfile

2. Use the Dockerfile to create a container image

3. Use the container image to create a running container

Dockerfile example

FROM alpine  #Defines the base image
CMD ["echo", "Hello World!"] #Prints the words "Hello World!" on the terminal

Docker build command

docker build -t my-app:v1 .

Docker image verification

docker images

Docker run command

docker run my-app:v1

docker ps -a  #To verify the details of the container created

Docker commands

 

Docker command	Purpose	Example
build	Creates cotainer images from a Dockerfile	docker build -t my-app:v1
images	Lists all images, repositories, tags, and sizes	docker images
run	Creates a container from an image	docker run -p 8080:80 nginx
push	Stores images in a configured registry	docker push my-app:v1
pull	Retrieves images from a configured registry	docker pull nginx