Docker commit

Docker commit used to reate a new image from a container’s changes.

You need to commit the changes you make to the container and then run it. Try this example:

sudo docker pull debian

After pull image from docker hub, you can customize to fit your enviroment 

in this example is just to try install apache2

sudo docker run debian apt-get update && apt-get install -y apache2

or you can access the bash with command:

sudo docker run debian

Check container id

sudo docker ps -l

Enter to the bash terminal

sudo docker exec -it <container_id> bash

 apt-get update && apt-get install -y apache2

exit bash terminal

 exit

Commit changes to the container:

sudo docker commit <container_id> nasohi/www1

Now the container becomes the image, check with the following command:

sudo docker images

Then run the container:

sudo docker run nasohi/www1

Another way is you can make docker file and use docker build

Read also:
https://nciptandani.blogspot.com/search?q=docker

References:
https://www.techrepublic.com/article/how-to-commit-changes-to-a-docker-image/
https://docs.docker.com/engine/reference/commandline/commit/
https://linuxize.com/post/how-to-build-docker-images-with-dockerfile/